Patent US3645865A successfully refreshed from Google Patents.
US3645865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sols
Assignee: Monsanto Chemicals Ltd
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Filing: 1970-01-14
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Granted: 1972-02-29
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Expires: 1990-01-14
Abstract
Abstract THIS INVENTION INVOLVES A PROCESS FOR THE PRODUCTION OF A SILICA SOL IN WHICH AN ELECTRIC CURRENT IS PASSED THROUGH A LIQUID MEDIUM COMPRISING A SOLUTION IN A LOWER MONOHYDRIC ALCOHOL OF A METAL SALT THAT IS IONISED TO A SUFFICIENT EXTENT AND IS PRESENT IN SUFFICIENT AMOUNT TO FUNCTION AS A SUPPORTING ELECTROLYTE USING AN ANODE COMPRISING SILICON IN CONTACT WITH THE LIQUID MEDIUM WITH WATER BEING PRESENT IN AN MOUNT OF ABOUT 10% BY WEIGHT BASED ON THE WEIGHT OF THE LOWER MONOHYDRIC ALCOHOL.
Inventors
- 👤 Terence Gordon Tripp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:45
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/145
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |