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(12) Patent Application: | (11) CA 2257332 |
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(54) English Title: | CONTINUOUSLY SELF-CLEANING DRUM FILTER |
(54) French Title: | FILTRE A TAMBOUR A AUTONETTOYAGE CONTINU |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(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: | |
(74) Associate agent: | |
(45) Issued: | |
(22) Filed Date: | 1998-12-21 |
(41) Open to Public Inspection: | 2000-06-21 |
Examination requested: | 2004-12-21 |
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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A continuously self-cleaning filter consists of a rotating drum filter, an
oscillating high-pressure air nozzle to remove cake and particles from the
filter mesh; the means to drive the drum filter and the oscillating nozzle;
and
a chute to catch the material dislodged from the filter mesh and to direct it
to
a receiving tank.
To accomplish this, water, containing dirt particles, droplets of free
oil or metal particles, oil or other contaminants encapsulated in bentonite
clay, is directed onto the inner surface of the drum filter mesh, at the
lowest
point of its rotation, where substantially all of the water passes through the
filter mesh, while the particles or cake are trapped in the filter mesh and
travel to the top of the drum filter rotation, where they are blown out of the
filter mesh by compressed air, onto a receiving chute, and thereby directed to
a receiving tank. The clean water is collected in a separate receiver.
To this end, one end of the filter drum is solid and fixed rotatably on
essentially a horizontal axle, the other end of the drum has a circular
opening
through which the solids bearing water is introduced and the filtered cake
removed by the chute.
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 | 2006-12-21 |
Application Not Reinstated by Deadline | 2006-12-21 |
Inactive: Adhoc Request Documented | 2006-09-25 |
Inactive: IPC from MCD | 2006-03-12 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 2005-12-21 |
Letter Sent | 2005-02-07 |
Letter Sent | 2005-02-07 |
Reinstatement Requirements Deemed Compliant for All Abandonment Reasons | 2004-12-21 |
Request for Examination Requirements Determined Compliant | 2004-12-21 |
All Requirements for Examination Determined Compliant | 2004-12-21 |
Reinstatement Request Received | 2004-12-21 |
Inactive: Adhoc Request Documented | 2004-09-23 |
Inactive: Office letter | 2004-06-22 |
Change of Address Requirements Determined Compliant | 2004-06-22 |
Change of Address or Method of Correspondence Request Received | 2004-05-28 |
Reinstatement Requirements Deemed Compliant for All Abandonment Reasons | 2003-12-23 |
Request for Examination Received | 2003-12-23 |
Inactive: Abandon-RFE+Late fee unpaid-Correspondence sent | 2003-12-22 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 2003-12-22 |
Inactive: Office letter | 2003-01-16 |
Inactive: Cover page published | 2000-07-13 |
Application Published (Open to Public Inspection) | 2000-06-21 |
Inactive: Cover page published | 2000-06-20 |
Inactive: IPC assigned | 1999-02-16 |
Inactive: First IPC assigned | 1999-02-16 |
Classification Modified | 1999-02-16 |
Inactive: Filing certificate - No RFE (English) | 1999-02-01 |
Filing Requirements Determined Compliant | 1999-02-01 |
Inactive: Office letter | 1999-02-01 |
Application Received - Regular National | 1999-01-30 |
Abandonment Date | Reason | Reinstatement Date |
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2005-12-21 | ||
2004-12-21 | ||
2003-12-22 |
The last payment was received on 2004-12-21
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
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 | 1998-12-21 | ||
MF (application, 2nd anniv.) - small | 02 | 2000-12-21 | 1999-12-06 |
MF (application, 3rd anniv.) - small | 03 | 2001-12-21 | 2000-12-18 |
MF (application, 4th anniv.) - small | 04 | 2002-12-23 | 2001-12-24 |
MF (application, 5th anniv.) - small | 05 | 2003-12-22 | 2002-12-18 |
Request for examination - small | 2003-12-23 | ||
Reinstatement | 2004-12-21 | ||
2004-12-21 | |||
MF (application, 6th anniv.) - small | 06 | 2004-12-21 | 2004-12-21 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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MICHAEL E.S. LAWRENCE |
JAMES ANDREW SMITH |
Past Owners on Record |
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None |