Patent US4887588A successfully refreshed from Google Patents.
US4887588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease absorption box for roof use
Assignee: Individual
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Filing: 1988-12-27
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Granted: 1989-12-19
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Expires: 2008-12-27
Abstract
Abstract A grease absorption curb system for use in conjunction with roof top cooking exhaust fans to prevent grease which accumulates around restaurant exhaust fans from degrading roof top materials. The curb comprises a plurality of durable, lightweight, non-biodegradable blocks which are releasably joined together by a tongue and groove system to define a perimeter curb around the exhaust fan, with at least some of the blocks having drain tubes to allow water to drain from within the perimeter curb system to outside of the curb system.
Inventors
- 👤 Terry Rial
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:50
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
127 words
A grease absorption box for use with roof top cooking exhaust systems, comprising: (a) a plurality of durable, lightweight, non-biodegradable blocks, each of said blocks having means to be releasably joined to another of said blocks so as to allow formation of a perimeter curb around a roof top cooking exhaust fan, and with at least some of said blocks having means to allow water to drain from within said perimeter curb to outside of said perimeter curb; (b) a bottom bed of highly porous filler material within said perimeter curb; (c) a layer of water permeable flexible sheet material covering said porous filler material; and (d) on top of said sheet and substantial filling the rest of said perimeter curb a finely divided grease absorption material.
Claim 2
Dependent Claim
127 words
A grease absorption box for use with roof top cooking exhaust systems, comprising: (a) a plurality of durable, lightweight, non-biodegradable blocks, each of said blocks having means to be releasably joined to another of said blocks so as to allow formation of a perimeter curb around a roof top cooking exhaust fan, and with at least some of said blocks having means to allow water to drain from within said perimeter curb to outside of said perimeter curb; (b) a bottom bed of highly porous filler material within said perimeter curb; (c) a layer of water permeable flexible sheet material covering said porous filler material; and (d) on top of said sheet and substantial filling the rest of said perimeter curb a finely divided grease absorption material.
Claim 3
Dependent Claim
14 words
The grease absorption box of claim 1 wherein said bottom bed is pea grooved.
Claim 4
Dependent Claim
14 words
The grease absorption box of claim 1 wherein said flexible sheet is perforated visqueen.
Claim 5
Dependent Claim
16 words
The grease absorption box of claim 1 wherein said finely divided grease absorber is silica sand.
Claim 6
Dependent Claim
24 words
The grease absorption box of claim 1 wherein said means for releasably joining of one block to another is a tongue and groove system.
Claim 7
Dependent Claim
18 words
The grease absorption box of claim 1 wherein said blocks are made of a moldable polymeric resinous material.
Claim 8
Dependent Claim
15 words
The grease absorption box of claim 6 wherein said blocks are made of reinforced fiberglass.
Claim 9
Dependent Claim
30 words
The grease absorption box of claim 6 wherein said blocks are made from a moldable polymeric resinous material selected from the group consisting of polyvinyl chloride, polyethylene, polypropylene, and styrene.
Claim 10
Dependent Claim
23 words
The grease absorption box of claim 6 wherein said blocks are comprised of a shell of said material which defines a hollow interior.
Claim 11
Dependent Claim
28 words
The grease absorption box of claim 6 wherein each of said blocks has a flattened perimeter edge for resting in a free standing position on a flat surface.
Claim 12
Independent Claim
93 words
A method of controlling grease from collecting on the roofs of restaurants and the like comprising: (a) building a perimeter curb system around an exhaust fan from a plurality of lightweight durable, non-biodegradable blocks, with at least some of said blocks having means to allow water to drain from within said perimeter curb to outside of said perimeter curb; (b) filling said perimeter curb with a bottom layer of porous filler material which easily allows water to drain therethrough; and (c) placing over said bottom layer, a layer of removable grease absorption medium.
Claim 13
Independent Claim
93 words
A method of controlling grease from collecting on the roofs of restaurants and the like comprising: (a) building a perimeter curb system around an exhaust fan from a plurality of lightweight durable, non-biodegradable blocks, with at least some of said blocks having means to allow water to drain from within said perimeter curb to outside of said perimeter curb; (b) filling said perimeter curb with a bottom layer of porous filler material which easily allows water to drain therethrough; and (c) placing over said bottom layer, a layer of removable grease absorption medium.
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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) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |