Patent US3664985A successfully refreshed from Google Patents.
US3664985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of silicon-fluoride silicones
Assignee: United States Department of the Navy
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Filing: 1970-07-27
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Granted: 1972-05-23
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Expires: 1990-07-27
Abstract
Abstract A method is disclosed of selectively displacing hydride with fluoride at chain silicon positions in organopolysiloxane compounds. Also, 3-fluoroheptamethyltrisiloxane and the polymeric fluoro derivatives of liquid silicone hydrides are disclosed which have high thermal stability properties and are useful as high temperature-resistant release coatings.
Inventors
- 👤 A D Britt
- 👤 William B Moniz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:38
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
The process of claim 1 wherein a slight molar access of silver fluoride is used.
Claim 2
Dependent Claim
17 words
The process of claim 1 wherein the reaction is continued until substantially no hydrogen gas is evolved.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |