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Sommaire du brevet 2965568 

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Disponibilité de l'Abrégé et des Revendications

L'apparition de différences dans le texte et l'image des Revendications et de l'Abrégé dépend du moment auquel le document est publié. Les textes des Revendications et de l'Abrégé sont affichés :

  • lorsque la demande peut être examinée par le public;
  • lorsque le brevet est émis (délivrance).
(12) Brevet: (11) CA 2965568
(54) Titre français: TUYAUX A REVETEMENT INTERIEUR EN POLYMERE ET RACCORDS A COMPOSANTS REMPLACABLES
(54) Titre anglais: POLYMER-LINED PIPES AND FITTINGS WITH REPLACEABLE COMPONENTS
Statut: Accordé et délivré
Données bibliographiques
(51) Classification internationale des brevets (CIB):
  • F16L 39/00 (2006.01)
  • F16L 9/147 (2006.01)
  • F16L 9/18 (2006.01)
  • F16L 55/00 (2006.01)
  • F16L 57/06 (2006.01)
  • F16L 58/10 (2006.01)
(72) Inventeurs :
  • CHIOVELLI, STEFANO (Canada)
  • MOON, SOON WON (Canada)
  • RYAN, SHANE D. (Canada)
(73) Titulaires :
  • SYNCRUDE CANADA LTD. IN TRUST FOR THE OWNERS OF THE SYNCRUDE PROJECT AS
(71) Demandeurs :
  • SYNCRUDE CANADA LTD. IN TRUST FOR THE OWNERS OF THE SYNCRUDE PROJECT AS (Canada)
(74) Agent: BENNETT JONES LLP
(74) Co-agent:
(45) Délivré: 2020-08-18
(22) Date de dépôt: 2017-04-28
(41) Mise à la disponibilité du public: 2018-10-28
Requête d'examen: 2017-04-28
Licence disponible: S.O.
Cédé au domaine public: S.O.
(25) Langue des documents déposés: Anglais

Traité de coopération en matière de brevets (PCT): Non

(30) Données de priorité de la demande: S.O.

Abrégés

Abrégé français

Un tuyau ou un raccord comprend un chemisage polymère et un composant remplaçable comportant une bague extérieure ayant un diamètre extérieur correspondant au diamètre intérieur du tuyau ou du raccord, un chemisage polymère lié à la bague extérieure et ayant un diamètre intérieur correspondant au diamètre intérieur du chemisage du tuyau ou du raccord. Le composant remplaçable est placé dans une entrée ou une sortie du tuyau ou du raccord pour former un conduit continu chemisé de polymère.


Abrégé anglais

A pipe or fitting having a polymer liner and a replaceable component including an outer ring having an outside diameter matching the inside diameter of the pipe or fitting, a polymer liner bonded to the outer ring and having an inside diameter matching the inside diameter of the liner of the pipe or fitting. The replaceable component is disposed in an inlet or outlet of the pipe or fitting so as to form a continuous bore lined with a polymer.

Revendications

Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.


WHAT IS CLAIMED IS:
1. A polymer-lined pipe or fitting having an end configured to receive a
replaceable
component to form a continuous bore, the end comprising a mechanical coupling
for
attaching and detaching another pipe or fitting, the replaceable component
comprising:
(a) an outer ring having at least a portion having an outside diameter
matching
an inside diameter of the pipe or fitting; and
(b) a polymer liner bonded to or encapsulating the outer ring and having an
inside diameter matching the inside diameter of the polymer liner of the pipe
or
fitting.
2. The pipe or fitting of claim 1 wherein the outer ring comprises two or
more rings,
separated by the polymer liner.
3. The pipe or fitting of claim 1 wherein the outer ring is a spirally
wound ring,
4. The pipe or fitting of claim 1 wherein the outer ring is elongated and
tapered to be a
portion of a truncated cone, the outer ring having a first end and a second
end, wherein
only the first end of the outer ring contacts an inside surface of the pipe.
5. The pipe or fitting of claim 2 wherein the outer ring comprises a first
ring having an
outside diameter matching the inside diameter of the pipe or fitting and a
second ring
13

having a smaller diameter, wherein only the first ring contacts an inside
surface of the
pipe or fitting.
6. The pipe or fitting of claim 4 wherein the polymer liner forms a lip at
the second end,
where the lip is in contact with the inside surface of the pipe.
7. The pipe or fitting of claim 5 wherein the polymer layer forms a lip at
the second ring,
where the lip is in contact with the inside surface of the pipe.
8, The pipe or fitting of claim 7 wherein an end ring is embedded inside
the lip.
14

Description

Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.


CA 2965568 2017-04-28
NS-536A
POLYMER-LINED PIPES AND FITTINGS WITH REPLACEABLE
COMPONENTS
Inventors: Soon Won MOON; Stefano CHIOVELLI; Shane D. RYAN
Assignee: Syncrude Canada Ltd. In Trust for the Owners of the Syncrude Project
Field of the Invention
[0001] The present invention relates generally to pipes and fittings having a
polymer liner,
and having replaceable inlet and/or outlet components.
Background
[0002] Due to superior wear and corrosion resistance, polymer-lined pipes and
fittings have
been used in many aggressive slurry services in the oil sands mining industry.
Rubbers and
polyurethanes are the main polymeric liner materials currently being used.
Liner thickness is
commensurate with length of the pipe run, and can exceed 1 inch in very long
pipe runs.
However, liner wear still occurs, and in particular, the inlets and outlets
often experience the
most serious liner wear. This is mainly due to pipe misalignment where the
resultant step
change in pipe inside diameter (ID) can cause so-called 'liner wash-out' due
to either direct
impingement from the slurry particles (prior art Fig. 1A) or slurry
turbulence. The wash-out
area is localized, normally less than a foot from the pipe connection between
the upstream
pipe (UP) and the downstream pipe (DP). Liner wear is often accelerated in
that localized
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wear zone, resulting in early retirement of the spool even though most areas
are in serviceable
condition.
[0003] When two different piping materials having significantly different wear
rates are
connected side by side, ID mismatch can develop during pipe operation and this
can also lead
to accelerated liner wear near the pipe connection. Piping components can have
different
geometries (i.e. elbows vs. straight spools) having different wear profiles
and rotation
strategies and in this case, step change in ID can appear after pipe rotation.
It is challenging to
achieve ID match throughout the pipeline during operation.
[0004] Currently, field repair kits are used to address the localized liner
wear. Repair kits are
composed of two-part mixing components: once they are mixed together and
applied onto the
damage area, solid repair patch is formed after curing. Proper surface
preparation (solvent
cleaning, mechanical buffing on the liner adjacent to the damage area), good
environmental
control (temperature, humidity), and skillsets of the applicators are key to
success. Since
repairs are conducted in the field during outages where limited time and
resources are
available, it is challenging to achieve consistent repair quality.
Accordingly, there remains a
need for more efficient and reliable technologies to achieve smooth ID
transition in polymer-
lined pipeline.
[0005] When there is step-change in inside diameter at pipe connection due to
different inside
diameters (IDs) of mating pipes (prior art Fig. 1B), transition rings can be
used for smooth ID
transition. Transition rings use abrasion and wear resistant alloy linings
such as tungsten
carbide, which introduces significant cost increase. Also, transition rings
are flange-
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connected, thereby incorporating more pipe connection points with a resulting
increase in the
possibility of ID mismatch.
Summary Of The Invention
[0006] In one aspect, the invention may comprise a polymer-lined pipe or
fitting having
replaceable components, wherein the inlet and/or the outlet of the polymer-
lined pipe or
fitting is adapted to receive a replaceable component to form a continuous
bore. The
replaceable component may comprise:
a. an outer ring having at least a portion with an outside diameter matching
an
inside diameter of the pipe or fitting; and
b. a polymer liner bonded to the outer ring and having an inside diameter
matching the inside diameter of the polymer liner of the pipe or fitting.
100071 In some embodiments, the outer ring may comprise two or more rings,
separated by
the polymer liner, or may comprise a spirally wound ring, or may be elongated
and tapered to
be a portion of a truncated cone, wherein a first end of the outer ring
contacts an inside
surface of the pipe and a second end does not.
Brief Description of the Drawings
[0008] The following drawings form part of the specification and are included
to further
demonstrate certain embodiments or various aspects of the invention. In some
instances,
embodiments of the invention can be best understood by referring to the
accompanying
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drawings in combination with the detailed description presented herein. The
description and
accompanying drawings may highlight a certain specific example, or a certain
aspect of the
invention. However, one skilled in the art will understand that portions of
the example or
aspect may be used in combination with other examples or aspects of the
invention.
[0009] Figures IA and 1B are cross-sectional views of prior art pipes
assembled with an
adjacent pipe or fitting, or a transition ring.
[0010] Figure 2 is a longitudinal cross-sectional view of one embodiment of a
pipe, with
perspective views of replaceable components at both ends of the pipe.
[0011] Figure 3 is a longitudinal cross-sectional view of the embodiment shown
in Figure 2,
showing the replaceable components with a square cut end.
[0012] Figure 4 is a longitudinal cross-sectional view of the embodiment shown
in Figure 2,
showing the replaceable components with an angle cut end,
[0013] Figure 5 is a longitudinal cross-sectional view of an alternative
embodiment of Figure
2, showing outer ring of the replaceable components is lined, coated, or
encapsulated for
corrosion protection,
[0014] Figure 6 is a longitudinal cross-sectional view of pipe connection,
showing the
replaceable component being interlocked between parent and mating pipes.
[0015] Figure 7 is a cross-sectional view of replaceable components, showing
the polymer
liner protruding beyond two ends of the outer ring. When interlocked between
parent and
mating pipes, the protruded polymer is compressed to make compression fit,
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[0016] Figure 8 is a longitudinal cross-sectional view of pipe connection,
showing
replaceable components with tapered liner to achieve smooth ID transition.
[0017] Figure 9 is a longitudinal cross-sectional view of pipe connection,
showing
replaceable components with tapered liner to achieve smooth ID transition.
[0018] Figure 10 shows cross-sectional views of a replaceable component, each
showing a
replaceable component assembled from multiple sections.
100191 Figure 11 shows a longitudinal cross-sectional view of an alternative
embodiment,
where the outer ring comprises a plurality of narrow rings, gapped with the
polymer liner.
[0020] Figure 12 shows a longitudinal cross-sectional view of an alternative
embodiment,
where the outer ring is tapered to reduce surface area contact with the pipe.
100211 Figure 13 shows a longitudinal cross-sectional view of an alternative
embodiment,
where the outer ring comprises a plurality of narrow rings, gapped with the
polymer liner, and
having smaller diameters.
[0022] Figure 14 shows a longitudinal cross-sectional view of an alternative
embodiment,
where the outer ring is tapered, and an end ring.
[0023] Figure 15 shows a longitudinal cross-sectional view of an alternative
embodiment,
where the outer ring comprises a plurality of narrow rings, gapped with the
polymer liner, and
an end ring.
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CA 2965568 2017-04-28
Detailed Description
[0024] This invention relates to polymer-lined pipes and fittings with
replaceable inlet/outlet
components (10). The replaceable component (10) comprises an outer ring or
sleeve (12) and
an inner polymer liner (14).
[0025] The outer ring (12) is preferably a metal ring, such as steel, but may
be made from any
suitable rigid material which can provide structural integrity to support the
replaceable
component in place. The outer ring may be made of a non-metallic material such
as fiberglass
reinforced plastic.
[0026] The polymer liner (L) of the parent (P) pipe or fitting, and the
polymer liner (14) of
the replaceable component, may comprise any polymer suitable for lining pipes
used for
mining slurry transport, and are well known in the art. Especially, elastomers
have
demonstrated excellent wear performance in many slurry applications. An
elastomer is a
polymer having the property of elasticity, whereby the polymer deforms in
response to the
application of stress, and substantially recovers its original foul" when the
stress is removed.
Elastomers typically have a low Young's modulus and a high yield strain, as is
well known in
the art. Suitable elastomers include, without limitation, natural or synthetic
rubbers,
polyurethanes, thermoplastic polymers, and other thermoset polymers. Polymer
liner can
have fillers such as carbon black, Kevlar fibers or nano-fillers for higher
wear and tear
resistance, as is well known in the art.
[0027] It is preferable for the polymer liner (14) of the replaceable
component to be the same
or similar material as the polymer liner (L) of the pipe (P) or fitting it is
installed into, to
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CA 2965568 2017-04-28
mitigate uneven wear performance throughout the pipe. In one embodiment, the
polymer liner
(14) is fully bonded onto the outer ring (12) such as through a molding,
casting or vulcanizing
process.
[0028] The inlet and/or the outlet of the polymer-lined pipe or fitting is
configured to receive
the replaceable components as shown in Fig. 2. Essentially, the metallic shell
of the pipe (P)
extends beyond the polymer liner (L) by a distance substantially equal to the
length of the
replaceable component. In one embodiment, the outer diameter of the outer ring
(12) should
closely match the inside diameter of the pipe (P) in the groove, while the
inside diameter of
the polymer liner (14) of the replaceable components should closely match the
inside diameter
of the polymer liner (L) of the pipe (P).
[0029] The end of the replaceable components can be square-cut as shown in
Figure 3 or
angle-cut to make the mating interface between the replaceable component and
the parent
pipe away from the direction of the incoming slurry stream, as shown in Figure
4.
[0030] In one embodiment, the outer ring (12) can be encapsulated by the
polymer liner (14)
to prevent any possible corrosion on the metallic component (Figure 5).
Alternatively, the
exposed metallic surfaces in the replaceable components can be separately
lined or coated.
The exposed metallic surfaces of the parent pipe (P) in the groove can be
lined or coated to
prevent possible corrosion on the parent pipe. The replaceable components (10)
can be glued
to the pipe (P) or fitting for additional stability. The adhesive should have
sufficient strength
to provide proper stability during operation, however still allow separation
when required for
replacement. Sealing agents compatible with the polymer liner (L, 14), such as
those found in
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WSLEGAL\053707 100511 \17805614v3

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field repair kits may also be used to fill any gaps, seams, and rough surface
profiles to achieve
smooth bore.
[0031] The replaceable component (10) can be interlocked between the parent
pipe (P) and a
mating pipe (P'), as shown in Figure 6. A tight seal between pipes (P, P') may
be achieved
with tight tolerance control and a compression-fit design. For example, the
polymer liner (14)
in the replaceable components (10) may be slightly oversized in the axial
direction, so as for
polymer liner to protrude slightly beyond two ends of the outer ring (Figure
7). Thus, when
interlocked between parent and mating pipes, the protruded polymer can be
compressed to
make compression fit.
[0032] The polymer-lined pipes and fittings with replaceable inlet/outlet
components of this
invention disclosure can be used as an alternative to transition rings to
accommodate mating
between pipes with different inside diameters. The polymer liner (14) in the
replaceable
component (10) may be tapered with increasing diameter (Figure 8) or
decreasing diameter
(Figure 9) so as to form a conically shaped inner bore. In each case, the
smooth transition in
inside diameter can be achieved at the pipe connection. The polymer liner (14)
may be
tapered by molding or casting in the desired shape, or by machining flat-faced
liner.
[0033] For easy rotation or replacement, the replaceable components can be
sectioned into
multiple pieces (i.e. two, three or four pieces) as shown by the dashed lines
in Figure 10.
[0034] In an alternative embodiment, the replaceable component may comprise
two or more
outer rings (20), which may be of narrower width than if a single outer ring
is used. As
shown in Figure 11, the multiple rings (20) may be uniformly spaced, with the
polymer liner
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CA 2965568 2017-04-28
(14) disposed in the gaps between adjacent rings. In another embodiment, the
replaceable
component may comprise an outer ring which is a spirally wound ring, leading
to increased
flexibility of the replaceable ring and the resultant benefits in
assembly/disassembly during
installation.
[0035] In another alternative embodiment, as shown in Figure 12, the outer
ring (30) may be
elongated and have a slight taper, to have a smaller diameter at one end. As a
result, the outer
ring may have the shape of a portion of a truncated cone. The polymer liner
(14) may wrap
around the reduced diameter end, to form a lip (16) which seals against the
inside of the pipe
(P). This configuration reduces the contact area between replaceable component
(10) and the
pipe (P), which may make insertion and removal more convenient. In another
variation, as
shown in Figure 13, two or more outer rings (20) with a slightly diminishing
diameter may be
provided, which also has the effect of reducing contact area between the
replaceable
component (10) and the pipe.
[0036] In a further alternative example, as shown in Figure 14, a combination
of a truncated
cone ring (30) together with a single end ring (22) disposed within the lip
(16) may provide
the combination of easy installation or removal, and enhanced structural
integrity.
[0037] In yet another alternative, a combination of multiple rings (20) with
slightly
diminishing diameters, and an end ring (22) disposed within the lip may be
used, as shown in
Figure 15.
[0038] Once the replaceable component has serious liner wear on the bottom,
only the
replaceable component can be rotated. This can bring significant benefits in
maintenance
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CA 2965568 2017-04-28
compared to rotating the entire pipe or fitting. Once the replaceable
component is seriously
worn out around the circumference, only the replaceable component can be
replaced. This can
bring significant benefits in maintenance compared to replacing the entire
pipe or fitting. This
is similar to replacing ink cartridge in printers, not requiring significant
time, environmental
control, and skillsets as being required for repair kits.
[0039] It is believed by using the replaceable inlet/outlet components (10)
described herein,
the lifecycle of the polymer-lined pipes or fittings can be extended. Also, it
is hoped that by
using the replaceable components with a tapered liner, significant cost
benefit can be achieved
by avoiding use of expensive transition rings.
[0040] Definitions and Interpretation
[0041] The singular forms "a," "an," and "the" include plural reference unless
the context
clearly dictates otherwise. It is further noted that the claims may be drafted
to exclude any
optional element. As such, this statement is intended to serve as antecedent
basis for the use
of exclusive terminology, such as "solely," "only," and the like, in
connection with the
recitation of claim elements or use of a "negative" limitation. The terms
"preferably,"
"preferred," "prefer," "optionally," "may," and similar terms are used to
indicate that an item,
condition or step being referred to is an optional (not required) feature of
the invention.
[0042] The term "and/or" means any one of the items, any combination of the
items, or all of
the items with which this term is associated. The phrase "one or more" is
readily understood
by one of skill in the art, particularly when read in context of its usage.
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[00431 As will be understood by one skilled in the art, for any and all
purposes, particularly in
terms of providing a written description, all ranges recited herein also
encompass any and all
possible sub-ranges and combinations of sub-ranges thereof, as well as the
individual values
making up the range, particularly integer values. A recited range of values
includes each
specific value, integer, decimal, or identity within the range. Any listed
range can be easily
recognized as sufficiently describing and enabling the same range being broken
down into at
least equal halves, thirds, quarters, fifths, or tenths. As a non-limiting
example, each range
discussed herein can be readily broken down into a lower third, middle third
and upper third,
etc.
100441 As will also be understood by one skilled in the art, all language such
as "up to", "at
least", "greater than", "less than", "more than", "or more", and the like,
include the number
recited and such terms refer to ranges that can be subsequently broken down
into sub-ranges
as discussed above. In the same manner, all ratios recited herein also include
all sub-ratios
falling within the broader ratio. Accordingly, specific values recited for
radicals, substituents,
and ranges, are for illustration only; they do not exclude other defined
values or other values
within defined ranges for radicals and substituents.
100451 One skilled in the art will also readily recognize that where members
are grouped
together in a common manner, such as in a Markush group, the invention
encompasses not
only the entire group listed as a whole, but each member of the group
individually and all
possible subgroups of the main group. Additionally, for all purposes, the
invention
encompasses not only the main group, but also the main group absent one or
more of the
group members. The invention therefore envisages the explicit exclusion of any
one or more
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CA 2965568 2017-04-28
of members of a recited group. Accordingly, provisos may apply to any of the
disclosed
categories or embodiments whereby any one or more of the recited elements,
species, or
embodiments, may be excluded from such categories or embodiments, for example,
as used in
an explicit negative limitation.
[0046] As will be apparent to those skilled in the art, various modifications,
adaptations and
variations of the foregoing specific disclosure can be made without departing
from the scope
of the invention claimed herein. The various features and elements of the
invention described
herein may be combined in a manner different than the specific examples
described or
claimed herein without departing from the scope of the invention. In other
words, any
element or feature may be combined with any other element or feature in
different
embodiments, unless there is an obvious or inherent incompatibility between
the two, or it is
specifically excluded.
12
WSLEGAL 053707 `, 00511 \ 17805614v3

Dessin représentatif
Une figure unique qui représente un dessin illustrant l'invention.
États administratifs

2024-08-01 : Dans le cadre de la transition vers les Brevets de nouvelle génération (BNG), la base de données sur les brevets canadiens (BDBC) contient désormais un Historique d'événement plus détaillé, qui reproduit le Journal des événements de notre nouvelle solution interne.

Veuillez noter que les événements débutant par « Inactive : » se réfèrent à des événements qui ne sont plus utilisés dans notre nouvelle solution interne.

Pour une meilleure compréhension de l'état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , Historique d'événement , Taxes périodiques et Historique des paiements devraient être consultées.

Historique d'événement

Description Date
Représentant commun nommé 2020-11-07
Accordé par délivrance 2020-08-18
Inactive : Page couverture publiée 2020-08-17
Inactive : Taxe finale reçue 2020-06-05
Préoctroi 2020-06-05
Requête pour le changement d'adresse ou de mode de correspondance reçue 2020-06-05
Un avis d'acceptation est envoyé 2020-04-24
Lettre envoyée 2020-04-24
Un avis d'acceptation est envoyé 2020-04-24
Inactive : COVID 19 - Délai prolongé 2020-03-29
Inactive : Q2 réussi 2020-03-26
Inactive : Approuvée aux fins d'acceptation (AFA) 2020-03-26
Modification reçue - modification volontaire 2020-02-24
Représentant commun nommé 2019-10-30
Représentant commun nommé 2019-10-30
Inactive : Dem. de l'examinateur par.30(2) Règles 2019-10-18
Inactive : Rapport - CQ réussi 2019-10-11
Modification reçue - modification volontaire 2019-07-16
Inactive : Dem. de l'examinateur par.30(2) Règles 2019-01-24
Inactive : Rapport - CQ réussi 2019-01-18
Modification reçue - modification volontaire 2018-11-08
Demande publiée (accessible au public) 2018-10-28
Inactive : Page couverture publiée 2018-10-28
Inactive : Dem. de l'examinateur par.30(2) Règles 2018-05-11
Inactive : Rapport - Aucun CQ 2018-05-07
Lettre envoyée 2017-06-22
Inactive : Transfert individuel 2017-06-15
Modification reçue - modification volontaire 2017-05-30
Inactive : Certificat de dépôt - RE (bilingue) 2017-05-19
Exigences de dépôt - jugé conforme 2017-05-19
Lettre envoyée 2017-05-11
Inactive : CIB attribuée 2017-05-10
Inactive : CIB en 1re position 2017-05-10
Inactive : CIB attribuée 2017-05-10
Inactive : CIB attribuée 2017-05-10
Inactive : CIB attribuée 2017-05-10
Inactive : CIB attribuée 2017-05-10
Inactive : CIB attribuée 2017-05-10
Demande reçue - nationale ordinaire 2017-05-04
Exigences pour une requête d'examen - jugée conforme 2017-04-28
Toutes les exigences pour l'examen - jugée conforme 2017-04-28

Historique d'abandonnement

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Taxes périodiques

Le dernier paiement a été reçu le 2020-01-09

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Historique des taxes

Type de taxes Anniversaire Échéance Date payée
Requête d'examen - générale 2017-04-28
Taxe pour le dépôt - générale 2017-04-28
Enregistrement d'un document 2017-06-15
TM (demande, 2e anniv.) - générale 02 2019-04-29 2019-01-15
TM (demande, 3e anniv.) - générale 03 2020-04-28 2020-01-09
Taxe finale - générale 2020-08-24 2020-06-05
TM (brevet, 4e anniv.) - générale 2021-04-28 2021-02-25
TM (brevet, 5e anniv.) - générale 2022-04-28 2022-04-13
TM (brevet, 6e anniv.) - générale 2023-04-28 2023-02-28
TM (brevet, 7e anniv.) - générale 2024-04-29 2024-03-27
Titulaires au dossier

Les titulaires actuels et antérieures au dossier sont affichés en ordre alphabétique.

Titulaires actuels au dossier
SYNCRUDE CANADA LTD. IN TRUST FOR THE OWNERS OF THE SYNCRUDE PROJECT AS
Titulaires antérieures au dossier
SHANE D. RYAN
SOON WON MOON
STEFANO CHIOVELLI
Les propriétaires antérieurs qui ne figurent pas dans la liste des « Propriétaires au dossier » apparaîtront dans d'autres documents au dossier.
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Description du
Document 
Date
(aaaa-mm-jj) 
Nombre de pages   Taille de l'image (Ko) 
Dessin représentatif 2018-09-25 1 23
Description 2017-04-28 12 444
Abrégé 2017-04-28 1 12
Dessins 2017-04-28 16 469
Revendications 2017-04-28 2 35
Description 2017-05-30 12 415
Dessin représentatif 2018-09-25 1 23
Page couverture 2018-09-25 1 55
Revendications 2018-11-08 2 37
Revendications 2019-07-16 2 39
Revendications 2020-02-24 2 43
Page couverture 2020-07-27 1 51
Dessin représentatif 2020-07-27 1 22
Paiement de taxe périodique 2024-03-27 5 171
Accusé de réception de la requête d'examen 2017-05-11 1 176
Certificat de dépôt 2017-05-19 1 204
Courtoisie - Certificat d'enregistrement (document(s) connexe(s)) 2017-06-22 1 102
Rappel de taxe de maintien due 2018-12-31 1 112
Avis du commissaire - Demande jugée acceptable 2020-04-24 1 550
Modification / réponse à un rapport 2018-11-08 6 187
Modification / réponse à un rapport 2017-05-30 5 141
Demande de l'examinateur 2018-05-11 3 196
Demande de l'examinateur 2019-01-24 3 192
Modification / réponse à un rapport 2019-07-16 6 175
Demande de l'examinateur 2019-10-18 3 176
Modification / réponse à un rapport 2020-02-24 9 192
Taxe finale / Changement à la méthode de correspondance 2020-06-05 3 94