US3690822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly siliceous solid sodium silicate
Assignee: OCCIDENTIAL ELECTROCHEMICALS Corp
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Filing: 1970-12-21
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Granted: 1972-09-12
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Expires: 1990-12-21
Abstract
Abstract A PROCESS IS DESCRIBED FOR PREPARING A SOLID SODIUM SILICATE HAVING A SIO2:NA2O WEIGHT RATIO FROM ABOUT 4.0:1-5.3:1 BY THE DIRECT REACTION OF A MIXTURE OF 40-60 PERCENT WATER, A SOLUBLE SODIUM SILICATE HAVING A RATIO OF LESS THAN 4.0:1 AND AN AMORPHOUS FINELY-DIVIDED SILICA, THE AMOUNT OF SILICA BEING SUFFICIENT TO YIELD, IN COMBINATION WITH THE SODIUM SILICATE, THE DESIRED FINAL WEIGHT RATIO. REACTION TAKES PLACE AT A TEMPERATURE LESS THAN THAT AT WHICH INTUMESCENCE OCCURS. THE WATER-SOLUBLE, HIGH WATER CONTENT, SOLID PRODUCT SO OBTAINED IS ALSO DESCRIBED.
Inventors
- 👤 Clyde B Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |