Patent US2993809A successfully refreshed from Google Patents.
US2993809A
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Method for making treated silica fillers
Assignee: General Electric Co
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Filing: 1959-10-23
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Granted: 1961-07-25
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Expires: 1979-10-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Bueche
- 👤 Curtis S Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:33
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C08; C08K; C08K9/00; C08K9/04; C08K9/06; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/20; C01P2006/90
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
THE PROCESS FOR OBTAINING A HYDROPHOBIC FUME SILICA WHICH COMPRISES SUBJECTING SILICON TETRACHLORIDE TO A COMBUSTION ZONE CONTAINING HYDROGEN AND OXYGEN AND IMMEDIATELY AFTER COMBUSTION OF THE SILICON TETRACHLORIDE HAS TAKEN PLACE TO FORM FUME SILICA IN THE FINELY DIVIDED STATE, CONTACTING SAID FUME SILICA WHILE IT IS STILL AT A TEMPERATURE OF FROM .150 TO 500*C., WITH AN ORGANOHYDROLYZABLE SILANE HAVING THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |