Patent US3799962A successfully refreshed from Google Patents.
US3799962A
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US
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Alkoxysiloxanols
Assignee: Wacker Chemical Corp
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Filing: 1971-12-30
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Granted: 1974-03-26
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Expires: 1991-12-30
Abstract
Abstract ALPHA-ALKOXY-OMEGA-SILOXANOLS, R''O(R2SIO)XH, ARE PRODUCES BY CONTACTING CYCLIC SILOXANES WITH ALCOHOLS UNDER MILD CONDITIONS. FOR EXAMPLE HEXAMETHYLCYLOTRISILOXANE HEATED AT REFLUX IN METHANOL FOR FOUR HOURS GIVES 5- METHOXYHEXAMETHYLTRISILOXAN-1-OL IN HIGH YIELD. THE REACTION PROCEEDS MORE RAPIDLY IN THE PRESENCE OF WEAK ACIDS OR BASES. THE PRODUCTS ARE USEFUL AS ANTISTRUCTURE AGENTS COUPLING AGENTS, AND FILLER-TREATING AGENTS FOR SILICONE ELASTOMERS.
Inventors
- 👤 R Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:41
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/12; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/40; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0874; C07F7/0876; C08; C08G; C08G77/00; C08G77/04; C08G77/045; C08L; C08L83/00; C08L83/04; C01; C01P; C01P2004/00; C01P2004/10; C01P2006/00; C01P2006/90; C08G77/14; C08G77/16; C08G77/18; C08G77/20; C08G77/22; C08G77/24; C08G77/26
Claims Analysis
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |