US3304318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for hydrolyzing alkoxysilanes
Assignee: Dow Silicones Corp
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Filing: 1962-08-27
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Granted: 1967-02-14
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Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Sam A Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:15
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08; C08G77/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A PROCESS FOR PREPARING A SILOXANE OF THE UNIT FORMULA RNHMSIO(4-N-M)2 WHICH COMPRISES CONTACTING A SILANE OF THE FORMULA RNHMSI(OR'')4-N-M IN THE PRESENCE OF A SULFONIC ACID CATION EXCHANGE RESIN WITH SUFFICIENT WATER TO COMPLETELY HYDROLYZE THE SILANE AND THEN CONDENSING THE HYDROLYSIS PRODUCT OBTAINED, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON AND HALOGENATED MONOVALENT HYDROCARBON RADICALS, R'' IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS FROM 1 TO 6 INCLUSIVE CARBON ATOMS AND -(CH2)NOR" RADICALS, WHEREIN R" IS AN ALKYL RADICAL FROM 1 TO 3 INCLUSIVE CARBON ATOMS, N HAS A VALUE FROM 1 TO 3 INCLUSIV, M HAS A VALUE OF FROM 0 TO 1 INCLUSIVE, AND THE SUM OF M+ N IS FROM 1 TO 3 INCLUSIVE.
References Cited (Backward Citations)
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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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |