Patent US5442785A successfully refreshed from Google Patents.
Patent US3827869A successfully refreshed from Google Patents.
US3827869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of foamed silicate moldings where the foamable composition is gelled prior to foaming
Assignee: Bayer AG
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Filing: 1973-02-15
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Granted: 1974-08-06
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Expires: 1993-02-15
Abstract
Abstract THE PRESENT INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF FOAMING MOLDINGS HAVING A SILICATE SKELETON WHICH COMPRISES MIXING IN AQUEOUS SOLUTION CONTAINING A WATER SOLUBLE SILICATE, A GELLING AGENT AND A FOAMING AGENT WHICH LIBERATES A VOLATILE SUBSTANCE ABOVE ABOUT 70*C., CONVERTING SAID MIXTURE INTO A GEL AND THEN FOAMING SAID GEL BY HEATING IT ABOVE 70*C. IT IS PREFERRED TO USE AS SILICATE SOLUTION A SODIUM WATERGLASS SOLUTION, AS GELLING AGENT CHLOROFORMIC ACID ESTERS AND AS FOAMING AGENTS PETROL, LIGHT PETROL OR PETROL ETHER.
Inventors
- 👤 Bonin W Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:35
CPC Classifications
C; C04; C04B; C04B16/00; C04B16/04; C04B24/00; C04B24/04; C04B28/00; C04B28/24; C04B28/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |