Canadian Patents Database / Patent 2772439 Summary

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(12) Patent: (11) CA 2772439
(54) English Title: GROUND CONTAINMENT LINERS
(54) French Title: DOUBLURES DE CONFINEMENT DE SOL
(51) International Patent Classification (IPC):
  • B32B 5/28 (2006.01)
  • B65D 90/24 (2006.01)
  • E04H 7/02 (2006.01)
  • F16N 31/00 (2006.01)
(72) Inventors (Country):
  • POWELL, BETH P. (United States of America)
(73) Owners (Country):
  • NEW PIG CORPORATION (United States of America)
(71) Applicants (Country):
  • NEW PIG CORPORATION (United States of America)
(74) Agent: SMART & BIGGAR
(45) Issued: 2015-09-08
(22) Filed Date: 2012-03-23
(41) Open to Public Inspection: 2013-05-04
Examination requested: 2014-05-27
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
61/555,523 United States of America 2011-11-04
13/404,992 United States of America 2012-02-24

English Abstract

The present invention provides containment liners to protect the environment from spills and leaks at oil and/or gas production sites and other sites. The containment liner comprises a first felt geotextile layer and a polymeric barrier layer embedded partially into the felt geotextile layer.


French Abstract

La présente invention a trait à des gaines de confinement conçues pour protéger lenvironnement contre les déversements et les fuites sur des sites de production de pétrole ou de gaz et dautres sites. La gaine de confinement comprend une première couche de géotextile feutré et une couche barrière en polymère partiellement intégrée à la couche de géotextile feutré.


Note: Claims are shown in the official language in which they were submitted.




CLAIMS:
1. A containment liner comprising:
a first felt geotextile layer;
a second felt geotextile layer covering at least a portion of the first felt
geotextile layer; and
at least one liquid impermeable polymeric barrier layer between the first and
second felt geotextile layers partially embedded into the first and second
felt geotextile layers,
wherein the at least one partially embedded polymeric barrier layer extends
into the felt
geotextile layers at least 5 percent of a thickness of the felt geotextile
layers.
2. The containment liner of Claim 1, wherein the at least one partially
embedded
polymeric barrier layer comprises a single layer that is partially embedded
into both of the
first and second felt geotextile layers.
3. The containment liner of Claim 1, wherein the at least one partially
embedded
polymeric barrier layer extends into the felt geotextile layers from 10 to 80
percent of the
thickness of the felt geotextile layers.
4. The containment liner of Claim 1, wherein the at least one partially
embedded
polymeric barrier layer extends into the felt geotextile layers from 15 to 50
percent of the
thickness of the felt geotextile layers.
5. The containment liner of Claim 1, wherein the at least one partially
embedded
polymeric barrier layer extends into the felt geotextile layers a distance of
from 3 to 30 mil.
6. The containment liner of Claim 1, wherein at least one of the first and
second
felt geotextile layers comprises a heat treated surface.
7. The containment liner of Claim 1, wherein the first and second felt
geotextile
layers comprise heat treated outer surfaces.
- 13 -




8. The containment liner of Claim 1, wherein the first and second felt
geotextile
layers comprise fibers selected from wool, hemp, coconut, jute, polyester,
polypropylene,
nylon, rayon, polytetrafluoroethylene, aromatic polyamide aramid, poly para-
phenyleneterephthalamide and a combination thereof.
9. The containment liner of Claim 8, wherein the fibers are nonwoven.
10. The containment liner of Claim 8, wherein the fibers are woven.
11. The containment liner of Claim 1, wherein the first and second felt
geotextile
layers comprise needlepunched polypropylene or woven reinforced needlepunched
polypropylene.
12. The containment liner of Claim 1, wherein the first and second felt
geotextile
layers have thicknesses of from 25 to 500 mil.
13. The containment liner of Claim 12, wherein the thicknesses of the first
and
second felt geotextile layers are the same.
14. The containment liner of Claim 12, wherein the thicknesses of the first
and
second felt geotextile layers are different.
15. The containment liner of Claim 1, wherein the at least one partially
embedded
polymeric barrier layer is extruded.
16. The containment liner of Claim 1, wherein the at least one partially
embedded
polymeric barrier layer comprises polypropylene, thermoplastic olefin, linear
low-density
polyethylene, low-density polyethylene, medium-density polyethylene, high-
density
polyethylene, polyethylene terephthalate, polybutylene terephthalate.
polyvinyl chloride
(PVC), nylon, polystyrene, polyurethane, ethylene vinyl acetate, styrene block
copolymers or
a combination thereof.
17. The containment liner of Claim 1, wherein the at least one partially
embedded
polymeric barrier layer comprises polypropylene, polyethylene, thermoplastic
olefins or a
combination thereof.
-14-




18. The containment liner of Claim 1, wherein a non-embedded portion of
each
partially embedded polymeric barrier layer has a thickness of from 2 to 60
mils.
19. The containment liner of Claim 1, comprising at least two of the
partially
embedded polymeric barrier layers, wherein one of the partially embedded
polymeric barrier
layers is partially embedded in the first felt geotextile layer, and another
one of the partially
embedded polymeric barrier layers is partially embedded in the second felt
geotextile layer.
20. The containment liner of Claim 19, further comprising at least one
intermediate
layer between the at least two partially embedded polymeric barrier layers.
21. The containment liner of Claim 20, wherein the intermediate layer
comprises
polypropylene, thermoplastic olefin, linear low-density polyethylene, low-
density
polyethylene, medium-density polyethylene, high-density polyethylene,
polyethylene
terephthalate, polybutylene terephthalate, polyvinyl chloride (PVC), nylon,
polystyrene,
polyurethane, ethylene vinyl acetate, styrene block copolymers or a
combination thereof.
22. The containment liner of Claim 20, wherein the intermediate layer
comprises
multiple polymeric layers.
23. The containment liner of Claim 20, wherein the intermediate layer
comprises
reinforcements selected from the group consisting of fibers, strings, scrim
cloth and
combinations thereof.
24. The containment liner of Claim 1, further comprising another
containment liner
section having an edge sealed to an edge of the containment liner.
25. The containment liner of Claim 24, wherein the edges are sealed by a
half lap
joint.
26. The containment liner of Claim 1, further comprising a berm surrounding
at
least a portion of the containment liner.
27. A containment liner comprising:
- 15 -




a felt geotextile layer; and
a liquid impermeable polymeric barrier layer partially embedded into the felt
geotextile layer, wherein the partially embedded polymeric barrier layer
extends into the felt
geotextile layer at least 5 percent of a thickness of the felt geotextile
layer, and the felt
geotextile layer comprises a heat treated surface on a side of the felt
geotextile layer opposite
from the polymeric barrier layer.
28. A method of making a containment liner comprising:
providing a first felt geotextile layer;
providing a second felt geotextile layer covering a portion of the first felt
geotextile layer; and
extruding a liquid impermeable polymeric barrier layer material adjacent to
the
first felt geotextile layer to thereby partially embed at least a portion of
the polymeric barrier
layer material into the first felt geotextile layer, wherein the partially
embedded polymeric
barrier layer extends into the first felt geotextile layer at least 5 percent
of a thickness of the
first felt geotextile layer.
29. The method of Claim 28, wherein the polymeric barrier layer material
contacts
the first felt geotextile layer in a molten state.
30. The method of Claim 28, wherein the polymeric barrier layer material is

extruded at a temperature of from 175 to 300°C.
31. The method of Claim 28, further comprising pressing the first felt
geotextile
layer and the polymeric barrier layer material together after the extrusion
step.
32. The method of Claim 31, wherein the pressing step is performed by nip
rollers.
33. The method of Claim 31, wherein the pressing step is performed at a
temperature of from 4 to 300°C.
- 16 -


A single figure which represents the drawing illustrating the invention.

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Admin Status

Title Date
(22) Filed 2012-03-23
(41) Open to Public Inspection 2013-05-04
Examination Requested 2014-05-27
(45) Issued 2015-09-08

Maintenance Fee

Description Date Amount
Last Payment 2017-03-20 $200.00
Next Payment if small entity fee 2018-03-23 $100.00
Next Payment if standard fee 2018-03-23 $200.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Filing $400.00 2012-03-23
Registration of Documents $100.00 2012-06-12
Maintenance Fee - Application - New Act 2 2014-03-24 $100.00 2014-03-06
Request for Examination $800.00 2014-05-27
Maintenance Fee - Application - New Act 3 2015-03-23 $100.00 2015-03-04
Final $300.00 2015-06-26
Maintenance Fee - Patent - New Act 4 2016-03-23 $100.00 2016-03-21
Maintenance Fee - Patent - New Act 5 2017-03-23 $200.00 2017-03-20

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Document
Description
Date
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Abstract 2012-03-23 1 9
Description 2012-03-23 12 668
Claims 2012-03-23 4 146
Drawings 2012-03-23 7 247
Representative Drawing 2012-09-24 1 33
Cover Page 2013-04-29 1 56
Description 2014-10-08 13 707
Claims 2014-10-08 4 158
Description 2015-03-12 13 715
Cover Page 2015-08-11 1 56
Prosecution-Amendment 2013-05-03 2 75
Prosecution-Amendment 2014-05-27 3 96
Prosecution-Amendment 2014-06-06 1 19
Prosecution-Amendment 2014-07-11 3 129
Prosecution-Amendment 2014-10-08 19 828
Prosecution-Amendment 2014-12-12 4 288
Prosecution-Amendment 2015-03-12 9 522
Correspondence 2015-06-26 2 74
Correspondence 2015-01-15 45 1,704