US2802850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophobic silicas
Assignee: General Electric Co
•
Filing: 1954-11-01
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Granted: 1957-08-13
•
Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 John W Wetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:00
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
THE PROCESS FOR FORMING A FINELY DIVIDED HYDROPHOBIC SILICA CONTAIONING SILICON-BONBED LOWER-ALKYL GROUPS WHICH COMPRISES (1) FORMING A WATER-OIL EMULSION OF A HYDROCARBON OIL OF BETWEEN 25 TO 3,000 CENTIPOISE VISCOSITY WITH AN AQUEOUS SOLUTION OF AN ALKALI-METAL SILICATE IN SUCH PROPORTIN THAT THE ALKALI-METAL SILICATE COMPRISES FROM 5 TO 25 PERCENT, BY WEIGHT, OF THE WEIGHT OF THE OIL, AND THE TOTAL WATER IN THE EMULSION IS ALSO EQUAL TO FROM 5 TO 25 PERCENT, BY WEIGHT OF THE WEIGHT OF THE OIL, (2) ADDING A 3 TO 15 PERCENT WEIGHT SOLUTION OF A LOWER ALKYLTRICHLOROSILANE TO THE STIRRED EMULSION OF (1) SO AS TO EFFECT HYDROLYSIS AND COCONDENSATION OF THE CHLOROSILANE AND SILICATE, AND (3) FILTERING THE MIXTURE TO REMOVE THE FINELY DIVIDED SILICA CONTAINING THE SILICON-BONDED LOWER ALKYL GROUPS..
Claim 2
Dependent Claim
132 words
THE PROCESS FOR FORMING A FINELY DIVIDED HYDROPHOBIC SILICA CONTAIONING SILICON-BONBED LOWER-ALKYL GROUPS WHICH COMPRISES (1) FORMING A WATER-OIL EMULSION OF A HYDROCARBON OIL OF BETWEEN 25 TO 3,000 CENTIPOISE VISCOSITY WITH AN AQUEOUS SOLUTION OF AN ALKALI-METAL SILICATE IN SUCH PROPORTIN THAT THE ALKALI-METAL SILICATE COMPRISES FROM 5 TO 25 PERCENT, BY WEIGHT, OF THE WEIGHT OF THE OIL, AND THE TOTAL WATER IN THE EMULSION IS ALSO EQUAL TO FROM 5 TO 25 PERCENT, BY WEIGHT OF THE WEIGHT OF THE OIL, (2) ADDING A 3 TO 15 PERCENT WEIGHT SOLUTION OF A LOWER ALKYLTRICHLOROSILANE TO THE STIRRED EMULSION OF (1) SO AS TO EFFECT HYDROLYSIS AND COCONDENSATION OF THE CHLOROSILANE AND SILICATE, AND (3) FILTERING THE MIXTURE TO REMOVE THE FINELY DIVIDED SILICA CONTAINING THE SILICON-BONDED LOWER ALKYL GROUPS..
References Cited (Backward Citations)
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US2588853A
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US2676182A
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US2715060A
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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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |