Patent US3854535A successfully refreshed from Google Patents.
US3854535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire inhibiting foam system
Assignee: WR Grace and Co Conn
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Filing: 1973-10-03
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Granted: 1974-12-17
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Expires: 1993-10-03
Abstract
Abstract The invention disclosed relates to a foam which is capable of absorbing and retaining significant amounts of water and which is disposed as part of a structure in association with fireextinguishing water outlets such that the foam inhibits fire by absorbing and retaining significant amounts of water released from the water outlets during a fire.
Inventors
- 👤 C Kehr
- 👤 N Marans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
A; A62; A62D; A62D1/00; A62C; A62C5/00; A62C5/002; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; C08G2110/00; C08G2110/0083; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/905; Y10S521/906; Y10S521/907; Y10S521/918
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A fire inhibiting system which comprises in combination, a water outlet disposed to release water under fire or smoke conditions, a water-retaining foam structure disposed to receive water from said outlet, said foam being capable of absorbing and retaining from about 5 to about 50 times its dry weight of water, and wherein the water outlet is disposed within the foam structure.
Claim 2
Dependent Claim
62 words
A fire inhibiting system which comprises in combination, a water outlet disposed to release water under fire or smoke conditions, a water-retaining foam structure disposed to receive water from said outlet, said foam being capable of absorbing and retaining from about 5 to about 50 times its dry weight of water, and wherein the water outlet is disposed within the foam structure.
Claim 3
Dependent Claim
29 words
The fire inhibiting system of claim 1 wherein the foam is hydrophilic, and the structure is a portion of a building wall, said water outlet being a fire-extinguishing sprinkler.
Claim 4
Dependent Claim
22 words
The fire inhibiting system of claim 1 wherein the foam is hydrophilic and is disposed as a portion of a furniture structure.
Claim 5
Dependent Claim
25 words
The fire inhibiting system of claim 1 wherein the foam is prepared using a polyisocyanate capped polyoxyethylene polyol, said foam having a crosslinked hydrophilic character.
Claim 6
Dependent Claim
20 words
The fire inhibiting system of claim 1 wherein the foam is compressed and expands to normal size upon receiving water.
Claim 7
Dependent Claim
13 words
The fire inhibiting foam system of claim 1 wherein the foam is polyurethane.
References Cited (Backward Citations)
US2017841A
Cited
US2977330A
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US3254464A
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US3463745A
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US3562985A
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US3694385A
Cited
US3707165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |