Patent US2863891A successfully refreshed from Google Patents.
US2863891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal organo-silyl esters
Assignee: Arthur D Little Inc
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Filing: 1955-03-18
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Granted: 1958-12-09
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Expires: 1975-03-18
Abstract
No abstract record available.
Inventors
- 👤 Felix E Granchelli
- 👤 Jr George B Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:33
CPC Classifications
C; C07; C07F; C07F11/00; C07F11/005; C07F9/00; C07F9/005; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR MAKING TRIS(TRIPHENYLSILY) VANDATE WHCIH COMPRISES REFLUXING TERTIARY-BUTYL VANDATE WITH TRIPHENYLCHLOROSILANE IN A WATERFREE, AROMATIC HYDROCARBON LIQUID, FILTERING OUT UNREACTED COMPONENTS AND REMOVING SAID LIQUID FROM THE TRIS(TRIPHENYLSILY) VANDATE THUS FORMED, SAID LIQUID BEING AT LEAST A PARTIAL SOLVENT FOR AT LEAST ONE OF THE REACTANTS AND UNREACTIVE THEREWITH, SAID REFLUXING BEING CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 30* AND 130*C. AND BELOW THAT TEMPERATURE AT WHICH DECOMPOSITION OF SAID REACTANTS TAKES PLACE, AND FOR A TIME SUFFICIENT TO EFFECT FORMATION OF SAID TRIS(TRIPHENYSILY) VANDATE.
Claim 2
Dependent Claim
88 words
A PROCESS FOR MAKING TRIS(TRIPHENYLSILY) VANDATE WHCIH COMPRISES REFLUXING TERTIARY-BUTYL VANDATE WITH TRIPHENYLCHLOROSILANE IN A WATERFREE, AROMATIC HYDROCARBON LIQUID, FILTERING OUT UNREACTED COMPONENTS AND REMOVING SAID LIQUID FROM THE TRIS(TRIPHENYLSILY) VANDATE THUS FORMED, SAID LIQUID BEING AT LEAST A PARTIAL SOLVENT FOR AT LEAST ONE OF THE REACTANTS AND UNREACTIVE THEREWITH, SAID REFLUXING BEING CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 30* AND 130*C. AND BELOW THAT TEMPERATURE AT WHICH DECOMPOSITION OF SAID REACTANTS TAKES PLACE, AND FOR A TIME SUFFICIENT TO EFFECT FORMATION OF SAID TRIS(TRIPHENYSILY) VANDATE.
References Cited (Backward Citations)
US2512058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |