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Any discrepancies in the text and image of the Claims and Abstract are due to differing posting times. Text of the Claims and Abstract are posted:
(12) Patent: | (11) CA 2236517 |
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(54) English Title: | FILTER CARTRIDGE SEALING METHOD |
(54) French Title: | MOYEN DE FERMETURE ETANCHE D'UNE CARTOUCHE DE FILTRE |
Status: | Expired and beyond the Period of Reversal |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | BLANEY MCMURTRY LLP |
(74) Associate agent: | |
(45) Issued: | 2000-11-28 |
(22) Filed Date: | 1998-05-01 |
(41) Open to Public Inspection: | 1999-11-01 |
Examination requested: | 1999-03-11 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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The present invention is directed to a filter
cartridge that provides for a secure dust tight seal and is
easily inserted and removed from a filtration unit. The
filter cartridge comprises a cartridge unit having a filter
element, a bottom cap and a top boot and a sealing sleeve
for insertion into the interior of the top boot. The top
boot has an outside diameter which is slightly smaller than
the inside diameter of the opening in a tube sheet into
which the filter cartridge is to be inserted so that the
cartridge may be easily inserted into and removed from the
opening in a tube sheet. The top boot is also provided
with a sealing ridge, which is located in the inside of the
boot at the sealing point. The inside diameter of the
sealing ridge is smaller than the cartridge boot and the
sealing sleeve. When the sealing sleeve is inserted into
the cartridge boot, the sealing sleeve contacts the sealing
ridge and causes an increase in diameter of the sealing
ridge. This in turns causes the sidewall of the cartridge
boot to balloon outwardly to contact the side of the
opening in a tube sheet and form a dust tight seal around
the opening in the tube sheet into which the filter
cartridge is inserted. To remove the cartridge from the
unit the sealing sleeve is removed from the cartridge and
than the cartridge is easily lifted out of the unit.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
2024-08-01:As part of the Next Generation Patents (NGP) transition, the Canadian Patents Database (CPD) now contains a more detailed Event History, which replicates the Event Log of our new back-office solution.
Please note that "Inactive:" events refers to events no longer in use in our new back-office solution.
For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Event History , Maintenance Fee and Payment History should be consulted.
Description | Date |
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Time Limit for Reversal Expired | 2012-05-01 |
Letter Sent | 2011-05-02 |
Small Entity Declaration Request Received | 2008-04-25 |
Small Entity Declaration Determined Compliant | 2008-04-25 |
Appointment of Agent Requirements Determined Compliant | 2006-04-28 |
Inactive: Office letter | 2006-04-28 |
Inactive: Office letter | 2006-04-28 |
Revocation of Agent Requirements Determined Compliant | 2006-04-28 |
Inactive: Entity size changed | 2006-04-19 |
Revocation of Agent Request | 2006-03-28 |
Appointment of Agent Request | 2006-03-28 |
Inactive: IPC from MCD | 2006-03-12 |
Inactive: Entity size changed | 2003-05-07 |
Grant by Issuance | 2000-11-28 |
Inactive: Cover page published | 2000-11-27 |
Pre-grant | 2000-08-25 |
Inactive: Final fee received | 2000-08-25 |
Notice of Allowance is Issued | 2000-05-16 |
Letter Sent | 2000-05-16 |
Notice of Allowance is Issued | 2000-05-16 |
Inactive: Approved for allowance (AFA) | 2000-04-20 |
Inactive: IPC assigned | 2000-04-20 |
Inactive: IPC assigned | 2000-04-20 |
Inactive: IPC assigned | 2000-04-20 |
Amendment Received - Voluntary Amendment | 2000-03-20 |
Application Published (Open to Public Inspection) | 1999-11-01 |
Inactive: Cover page published | 1999-10-31 |
Inactive: S.30(2) Rules - Examiner requisition | 1999-09-20 |
Advanced Examination Determined Compliant - paragraph 84(1)(a) of the Patent Rules | 1999-09-14 |
Letter sent | 1999-09-14 |
Inactive: Advanced examination (SO) | 1999-08-27 |
Inactive: Advanced examination (SO) fee processed | 1999-08-27 |
Inactive: Correspondence - Transfer | 1999-06-21 |
Letter Sent | 1999-05-31 |
Change of Address Requirements Determined Compliant | 1999-05-19 |
Inactive: Single transfer | 1999-04-27 |
Change of Address or Method of Correspondence Request Received | 1999-04-27 |
Letter Sent | 1999-04-07 |
All Requirements for Examination Determined Compliant | 1999-03-11 |
Request for Examination Requirements Determined Compliant | 1999-03-11 |
Request for Examination Received | 1999-03-11 |
Classification Modified | 1998-09-01 |
Inactive: First IPC assigned | 1998-09-01 |
Inactive: IPC assigned | 1998-09-01 |
Inactive: Courtesy letter - Evidence | 1998-07-21 |
Inactive: Filing certificate - No RFE (English) | 1998-07-15 |
Application Received - Regular National | 1998-07-14 |
There is no abandonment history.
The last payment was received on 2000-04-19
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
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO
Patent Fees
web page to see all current fee amounts.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Application fee - small | 1998-05-01 | ||
Request for examination - small | 1999-03-11 | ||
Registration of a document | 1999-04-27 | ||
Advanced Examination | 1999-08-27 | ||
MF (application, 2nd anniv.) - small | 02 | 2000-05-01 | 2000-04-19 |
Final fee - small | 2000-08-25 | ||
MF (patent, 3rd anniv.) - small | 2001-05-01 | 2001-04-27 | |
MF (patent, 4th anniv.) - small | 2002-05-01 | 2002-03-18 | |
Reversal of deemed expiry | 2002-05-01 | 2002-03-18 | |
MF (patent, 5th anniv.) - standard | 2003-05-01 | 2003-04-17 | |
MF (patent, 6th anniv.) - standard | 2004-05-03 | 2004-04-19 | |
MF (patent, 7th anniv.) - standard | 2005-05-02 | 2005-04-12 | |
MF (patent, 8th anniv.) - small | 2006-05-01 | 2006-03-28 | |
MF (patent, 9th anniv.) - small | 2007-05-01 | 2007-03-23 | |
MF (patent, 10th anniv.) - small | 2008-05-01 | 2008-04-25 | |
MF (patent, 11th anniv.) - small | 2009-05-01 | 2009-04-30 | |
MF (patent, 12th anniv.) - small | 2010-05-03 | 2010-04-30 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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MILTON MANUFACTURING INC. |
MILTON MANUFACTURING INC. |
Past Owners on Record |
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DAVID BRUNNER |