Patent US4297252A successfully refreshed from Google Patents.
US4297252A
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Aging-resistant fireproofing material
Assignee: BASF SE
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Filing: 1979-05-22
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Granted: 1981-10-27
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Expires: 1999-05-22
Abstract
Abstract A fireproofing material based on alkali metal silicates and containing from 20 to 60 percent by weight of water, which additionally contains from 1 to 10 percent by weight of a borate or an aluminate, preferably sodium aluminate, to improve the aging resistance. The fireproofing material can be used to insulate apertures and passages in building structures against the passage of fire and smoke, and can also be used as a fireproof glass.
Inventors
- 👤 Arndt C. Caesar
- 👤 Wolfram Koegel
- 👤 Ludwig Zuern
- 👤 Friedheim Gaertner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:05
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/02; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C09D; C09D5/00; C09D5/18; C09D5/185; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A fireproofing material which retains excellent foaming properties on aging and which comprises (A) 99-90 percent by weight of an alkali metal silicate containing 20-60 percent by weight of water; (B) 1-10 percent by weight of an aluminate; and (C) 2-20 percent by weight, based on the sum of A+B, of glass fibers.
Claim 2
Dependent Claim
53 words
A fireproofing material which retains excellent foaming properties on aging and which comprises (A) 99-90 percent by weight of an alkali metal silicate containing 20-60 percent by weight of water; (B) 1-10 percent by weight of an aluminate; and (C) 2-20 percent by weight, based on the sum of A+B, of glass fibers.
References Cited (Backward Citations)
GB1051078A
Cited
US2047016A
Cited
US3259536A
Cited
GB944133A
Cited
US3498807A
Cited
GB1269857A
Cited
DE2300724A1
Cited
FR2212826A5
Cited
US4036655A
Cited
US4064317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |