US6059852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic injection molded furnace filter
Assignee: Individual
•
Filing: 1998-10-08
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Granted: 2000-05-09
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Expires: 2018-10-08
Abstract
Abstract A furnace air filter includes a structure which has two identical rectangularly shaped grid members. The grid members are joined together at one side by a hinge, which hinge is made of the same plastic material as the grid members. The grid members and hinge are integrally formed preferably by an injection molding process. A filter media is placed between the grid members so as to form a filter unit adapted to be positioned in the filter track of a furnace air duct. The plastic grid structure is reusable, requiring the replacement of only the filter media.
Inventors
- 👤 Kenric J. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0005; B01D46/0016; B01D46/10; F; F23; F23D; F23D14/00; F23D14/46; F23D14/68
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
In combination, a furnace having a filter track and an air filter assembly removably disposed along the filter track of the furnace, said filter assembly comprising: a filter frame having two identical rectangularly-shaped grid members; each of said grid members includes a plurality of uniformly shaped grid openings distributed uniformly therethrough; means for joining said grid members along one side thereof, so that said grid members are foldable toward each other; an air filter media positioned between the folded grid members whereby to form said air filter assembly; wherein said grid members are retained in the folded disposition by the filter track of the furnace.
Claim 2
Dependent Claim
105 words
In combination, a furnace having a filter track and an air filter assembly removably disposed along the filter track of the furnace, said filter assembly comprising: a filter frame having two identical rectangularly-shaped grid members; each of said grid members includes a plurality of uniformly shaped grid openings distributed uniformly therethrough; means for joining said grid members along one side thereof, so that said grid members are foldable toward each other; an air filter media positioned between the folded grid members whereby to form said air filter assembly; wherein said grid members are retained in the folded disposition by the filter track of the furnace.
Claim 3
Dependent Claim
23 words
The combination furnace and air filter assembly as defined in claim 1 wherein said means for joining said grid members is a hinge.
Claim 4
Dependent Claim
22 words
The combination of the furnace and air filter assembly as defined in claim 2 wherein said grid members are made of plastic.
Claim 5
Dependent Claim
21 words
The combination of the furnace and air filter assembly as defined in claim 2 wherein said hinge is made of plastic.
Claim 6
Dependent Claim
24 words
The combination of the furnace and air filter assembly as defined in claim 2 wherein said grid members and said hinge are integrally formed.
Claim 7
Dependent Claim
26 words
The combination of the furnace and air filter assembly as defined in claim 5 wherein said grid members and said hinge are formed by injection molding.
Claim 8
Dependent Claim
26 words
The combination of the furnace and air filter assembly as defined in claim 6 wherein said assembly is dimensioned for installation in a furnace filter track.
Claim 9
Dependent Claim
31 words
The combination of the furnace and air filter assembly as defined in claim 7 wherein said filter frame is sized to fit the popular standard 20×25 inch air furnace filter track.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-09 | 2003-11-08 | 2004-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-09 | 2007-11-08 | 2008-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-09 | 2011-11-08 | 2012-05-09 | $7700.00 | Window Closed / Lapsed |