US5298044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended surface pocket type air filter
Assignee: BGE Service and Supply Ltd
•
Filing: 1993-06-01
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Granted: 1994-03-29
•
Expires: 2013-06-01
Abstract
Abstract An extended pocket type air filter formed of a single rectangular frame enclosing and locking a plurality of parallel header plates each having complementary projections and grooves on opposite edges, the complementary projections of one header fitting into the grooves of an adjacent header and securing pocket type air filter medium between them. A rivet secures ends of the frame to each other about the header plates.
Inventors
- 👤 Darrel Sutton
- 👤 Michael Benoit
- 👤 Daniel Gagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/02; B01D46/023; Y; Y10; Y10S; Y10S55/00; Y10S55/12; Y10S55/31
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
An extended surface pocket type air filter comprising: a plurality of header plates, each header plate including a first rigid side, a second rigid side and first and second ends extending between the first and second rigid sides to define at least one interior aperture; the first rigid side and the second rigid side of each header plate having first and second exterior edges respectively; the first exterior edge of each header plate including a set of tongues; the second exterior edge including a set of complementary grooves corresponding to the set of tongues; a generally rectangular frame having dimensions suitable to enclose and hold the header plates; and means to lock the frame about the header plates.
Claim 2
Dependent Claim
118 words
An extended surface pocket type air filter comprising: a plurality of header plates, each header plate including a first rigid side, a second rigid side and first and second ends extending between the first and second rigid sides to define at least one interior aperture; the first rigid side and the second rigid side of each header plate having first and second exterior edges respectively; the first exterior edge of each header plate including a set of tongues; the second exterior edge including a set of complementary grooves corresponding to the set of tongues; a generally rectangular frame having dimensions suitable to enclose and hold the header plates; and means to lock the frame about the header plates.
Claim 3
Dependent Claim
41 words
The extended surface pocket type air filter of claim 1 further including a plurality of bars extending from the first rigid side to the second rigid side of each header plate and defining a plurality of apertures in each header plate.
Claim 4
Dependent Claim
37 words
The extended surface pocket type air filter of claim 2 in which each aperture has an aspect ratio of between 1 and 2, with the longer dimension being parallel to the long dimension of the header plate.
Claim 5
Dependent Claim
21 words
The extended surface pocket type air filter of claim 3 in which each aperture has an aspect ratio of about 4/3.
Claim 6
Dependent Claim
27 words
The extended surface pocket type air filter of claim 2 in which each end of each header plate includes a tongue adapted to fit into the frame.
Claim 7
Dependent Claim
29 words
The extended surface pocket type air filter of claim 1 further including an air pocket filter medium disposed around each header plate and held firmly between adjacent header plates.
Claim 8
Dependent Claim
29 words
The extended surface pocket type air filter of claim 3 further including an air pocket filter medium disposed around each header plate and held firmly between adjacent header plates.
Claim 9
Dependent Claim
29 words
The extended surface pocket type air filter of claim 5 further including an air pocket filter medium disposed around each header plate and held firmly between adjacent header plates.
References Cited (Backward Citations)
US2499949A
Cited
US3190059A
Cited
US3131044A
Cited
US3422602A
Cited
US3620375A
Cited
US3871848A
Cited
US3997305A
Cited
US4300927A
Cited
US4312648A
Cited
US4356011A
Cited
CA1184514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |