US3696154A
Expired / Lapsed
US
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Perfluorinated ether sulfides
Assignee: Dow Chemical Co
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Filing: 1970-06-12
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Granted: 1972-10-03
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Expires: 1990-06-12
Abstract
Abstract Disclosed are perfluorinated ether sulfides characterized by the formula: In the above formula, WITH N BEING 2, 3 OR 4 AND Rf is a perfluoroaliphatic group or a perfluoroaliphatic ether containing from one to 20 carbon atoms. The unsaturated compounds are prepared by reacting a perfluoroalkoxy perfluorocycloalkene of the formula: WHEREIN Rf and n are as defined above with an alkali metal sulfide. Saturated perfluorinated either sulfides are prepared by adding fluorine across the double bond of the unsaturated compounds. These compounds are useful as hydraulic fluids for high temperature applications.
Inventors
- 👤 Richard W Anderson
- 👤 Hughie R Frick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:38
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C323/00; C07C323/10; C07C323/17; C07D; C07D339/00; C07D339/08; C07C2601/00; C07C2601/04; C07C2601/06; C07C2601/10; C07C2601/12; C07C2601/16; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
A compound as described in claim 1 wherein Rf is a secondary perfluoroalkyl group containing from three to six carbon atoms.
Claim 2
Dependent Claim
15 words
A compound as described in claim 2 wherein Rf is heptafluoroisopropyl and R is perfluorocyclobutenyl.
Claim 3
Dependent Claim
11 words
A compound as described in claim 3 wherein R is perfluorocyclobutyl.
Claim 4
Dependent Claim
12 words
A compound as described in claim 1 wherein Rf is perfluoro octyl.
Claim 5
Dependent Claim
10 words
A compound as described in claim 1 wherein Rf is
References Cited (Backward Citations)
US3322834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |