Patent US2769830A successfully refreshed from Google Patents.
US2769830A
Expired / Lapsed
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Process for preparing hexaethylcyclotrisiloxane
Assignee: Union Carbide Corp
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Filing: 1953-12-29
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Granted: 1956-11-06
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Expires: 1973-12-29
Abstract
No abstract record available.
Inventors
- 👤 Donald G Dobay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:07
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
AN IMPROVED PROCESS FOR PREPARING HEXAETHYLCYCLOTRISILOXANE BY THE HYDROLYSIS OF DIETHYLDICHLOROSILANE WHICH COMPRISES MIXING DIETHYLDICHLOROSILANE, SUBSTAN TIALLY FREE OF OTHER HYDROLYZABLE SILANES, WITH WATER AND AN ALIPHATIC ALCOHOL AS THE HYDROLYSIS MEDIUM, SAID ALIPHATIC ALCOHOL BEING COMPLETELY WATER SOLUBLE AND CONTAINING ONLY HYDROGEN, OXYGEN AND CARBON ATOMS AND AND HAVING ONLY A SINGLE HYDROXYL GROUP THEREIN, SAID WATER BEING PRESENT IN SAID MEDIUM IN AN AMOUNT BY VOLUME OF FROM ABOUT 3 PARTS OF WATER TO ABOUT 9 PARTS OF WATER PER PART OF ALCOHOL.
Claim 2
Dependent Claim
85 words
AN IMPROVED PROCESS FOR PREPARING HEXAETHYLCYCLOTRISILOXANE BY THE HYDROLYSIS OF DIETHYLDICHLOROSILANE WHICH COMPRISES MIXING DIETHYLDICHLOROSILANE, SUBSTAN TIALLY FREE OF OTHER HYDROLYZABLE SILANES, WITH WATER AND AN ALIPHATIC ALCOHOL AS THE HYDROLYSIS MEDIUM, SAID ALIPHATIC ALCOHOL BEING COMPLETELY WATER SOLUBLE AND CONTAINING ONLY HYDROGEN, OXYGEN AND CARBON ATOMS AND AND HAVING ONLY A SINGLE HYDROXYL GROUP THEREIN, SAID WATER BEING PRESENT IN SAID MEDIUM IN AN AMOUNT BY VOLUME OF FROM ABOUT 3 PARTS OF WATER TO ABOUT 9 PARTS OF WATER PER PART OF ALCOHOL.
References Cited (Backward Citations)
US2265962A
Cited
US2486162A
Cited
US2398672A
Cited
US2415389A
Cited
GB635995A
Cited
DE864152C
Cited
DE888851C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |