Patent EP0137965A2 successfully refreshed from Google Patents.
US4097385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-proofing sealing elements
Assignee: Bayer AG
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Filing: 1976-01-13
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Granted: 1978-06-27
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Expires: 1996-01-13
Abstract
Abstract A fire-proofing sealing material comprising a flexible tube enclosing an aqueous alkali metal silicate in the form of a solution or a gel. The sealing material is placed in an opening such as a joint or crack and, in the event of a fire, the silicate foams and forms a fire-proof seal.
Inventors
- 👤 Wulf von Bonin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:55
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/948; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1362; Y10T428/1386; Y10T428/139; Y10T428/1393
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
A fire-proofing sealing material comprising a flexible tube impermeable to water, resistant to aqueous alkali and enclosing an aqueous alkali metal silicate in the form of a solution or a gel.
Claim 2
Dependent Claim
31 words
A fire-proofing sealing material comprising a flexible tube impermeable to water, resistant to aqueous alkali and enclosing an aqueous alkali metal silicate in the form of a solution or a gel.
Claim 3
Dependent Claim
50 words
A sealing material according to claim 1, wherein the alkali metal silicate is sodium or potassium silicate with a molar ratio of Na 2 O or K 2 O to SiO 2 of about 1:1-4, the aqueous silicate having a solids content of about 30% to about 95% by weight.
Claim 4
Dependent Claim
51 words
A sealing material according to claim 1, wherein the alkali metal silicate is sodium silicate with a molar ratio of Na 2 O to SiO 2 of about 1:1.5-3, the aqueous silicate being in the form of a gel with a solids content of about 40% to about 60% by weight.
References Cited (Backward Citations)
US3928210A
Cited
US3968060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |