Patent US3642852A successfully refreshed from Google Patents.
US3642852A
Expired / Lapsed
US
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Process of producing halosiloxanes
Assignee: Evonik Operations GmbH
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Filing: 1969-01-16
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Granted: 1972-02-15
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Expires: 1989-01-16
Abstract
Abstract PROCESS FOR PRODUCING CERTAIN HALOSILOXANES BY REACTING THE CORRESPONDING ALKYLHALOSILANE WITH AN EXCESS OF TRIMETHYLHALOSILANE IN THE PRESENCE OF TERTIARY ALIPHATIC ALCOHOLS AT TEMPERATURES BELOW 40*C. THE PROCESS IS ADVANTAGEOUSLY CARRIED OUT IN THE PRESENCE OF A HYDROGEN HALIDE.
Inventors
- 👤 Gerd Rossmy
- 👤 Gotz Koerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:53
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/121; C07F7/126; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0874
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |