US4604114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fragrant scented air filter
Assignee: Individual
•
Filing: 1985-08-14
•
Granted: 1986-08-05
•
Expires: 2005-08-14
Abstract
Abstract A fragrant scented air filter particularly adapted for use in conjunction with interior building/air conditioning systems which includes a polygonal frame of a U-shaped inwardly opening cross-section defined by a bight portion and a pair of legs, a pad of air permeable, porous, fibrous filtering material having a peripheral edge portion bordered by the frame, and at least two solid rods of fragrant scented material spanning the frame in embedded relationship to the pad and in spaced parallel relationship to each other whereby air can freely pass the same with minimum velocity reduction and maximum fragrance absorption.
Inventors
- 👤 Robert Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; F; F24; F24F; F24F13/00; F24F13/28; Y; Y10; Y10S; Y10S261/00; Y10S261/65; Y10S261/88; Y10S428/00; Y10S428/905
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A fragrant scented air filter particularly adapted for use in conjunction with interior building heating/air conditioning systems comprising a generally polygonal frame of a U-shaped inwardly opening cross section, a pad of air permeable/porous fibrous filtering material having a polygonal peripheral edge portion bordered by said frame, said frame including a bight and a pair of opposite legs, means sandwiched between said pad and one of said legs for providing generally planar support of said pad against deflection/defibrillation thereof under the influence of air flow through said filter, and at least two solid rods of fragrant scented material spanning said frame in embedded relationship to said pad and in spaced relationship to each other whereby air can freely pass the same with minimum velocity reduction and maximum fragrance absorption.
Claim 2
Dependent Claim
129 words
A fragrant scented air filter particularly adapted for use in conjunction with interior building heating/air conditioning systems comprising a generally polygonal frame of a U-shaped inwardly opening cross section, a pad of air permeable/porous fibrous filtering material having a polygonal peripheral edge portion bordered by said frame, said frame including a bight and a pair of opposite legs, means sandwiched between said pad and one of said legs for providing generally planar support of said pad against deflection/defibrillation thereof under the influence of air flow through said filter, and at least two solid rods of fragrant scented material spanning said frame in embedded relationship to said pad and in spaced relationship to each other whereby air can freely pass the same with minimum velocity reduction and maximum fragrance absorption.
Claim 3
Dependent Claim
26 words
The fragrant scented air filter as defined in claim 1 wherein said rods each include an elongated central reinforcing element surrounded by said fragrant scented material.
Claim 4
Dependent Claim
21 words
The fragrant scented air filter as defined in claim 1 wherein said rods are in generally parallel relationship to each other.
Claim 5
Dependent Claim
48 words
The fragrant scented air filter as defined in claim 1 wherein said fragrant scented material has a relatively soft tacky exterior surface into which the fibrous material is at least partially embedded whereby should either rod sublimate or volatilize into pieces the pieces will be retained in place.
Claim 6
Dependent Claim
21 words
The fragrant scented air filter as defined in claim 2 wherein said rods are in generally parallel relationship to each other.
Claim 7
Dependent Claim
48 words
The fragrant scented air filter as defined in claim 2 wherein said fragrant scented material has a relatively soft tacky exterior surface into which the fibrous material is at least partially embedded whereby should either rod sublimate or volatilize into pieces the pieces will be retained in place.
Claim 8
Dependent Claim
48 words
The fragrant scented air filter as defined in claim 3 wherein said fragrant scented material has a relatively soft tacky exterior surface into which the fibrous material is at least partially embedded whereby should either rod sublimate or volatilize into pieces the pieces will be retained in place.
Claim 9
Dependent Claim
26 words
The fragrant scented air filter as defined in claim 7 wherein said rods each include an elongated central reinforcing element surrounded by said fragrant scented material.
Claim 10
Dependent Claim
75 words
A fragrant scented air filter particularly adapted for use in conjunction with interior building heating/air conditioning systems comprising a frame, a pad of air permeable/ porous fibrous filtering material bordered by said frame, a porous tube in embedded relationship relative to said pad, and particulate fragrant scented material in said porous tube whereby air can freely pass through the porous tube and the particulate fragrant scented material with minimum velocity reduction and maximum fragrance absorption.
Claim 11
Dependent Claim
75 words
A fragrant scented air filter particularly adapted for use in conjunction with interior building heating/air conditioning systems comprising a frame, a pad of air permeable/ porous fibrous filtering material bordered by said frame, a porous tube in embedded relationship relative to said pad, and particulate fragrant scented material in said porous tube whereby air can freely pass through the porous tube and the particulate fragrant scented material with minimum velocity reduction and maximum fragrance absorption.
Claim 12
Dependent Claim
40 words
The fragrant scented air filter as defined in claim 9 wherein said porous tube is a plastic sheet having a plurality of minute perforations therein of a size precluding exit of the particulate material, yet permitting free air flow therethrough.
Claim 13
Dependent Claim
17 words
The fragrant scented air filter as defined in claim 10 wherein said porous tube spans said frame.
Claim 14
Dependent Claim
19 words
The fragrant scented air filter as defined in claim 9 wherein said porous tube is constructed from porous paper.
Claim 15
Dependent Claim
17 words
The fragrant scented air filter as defined in claim 12 wherein said porous tube spans said frame.
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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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |