US4024192A
Expired / Lapsed
US
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Perfluorocyclohexyl ethers
Assignee: Hoechst AG
•
Filing: 1974-10-08
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Granted: 1977-05-17
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Expires: 1994-10-08
Abstract
Abstract New and useful perfluorinated cyclohexyl ethers are manufactured by reacting a phenol with hexafluoro propene or tetrafluoro ethylene, dissolving the partly fluorinated phenyl alkyl ethers obtained in hydrofluoric acid and electrolyzing the solution.
Inventors
- 👤 Siegfried Benninger
- 👤 Thomas Martini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:16
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/27; C25B3/28; C25B3/01; C25B3/07; C25B3/11
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
20 words
A compound having the formula ##STR12## wherein b is 3, 4, 5 or 6 and x is 2 or 3.
Claim 2
Dependent Claim
20 words
A compound having the formula ##STR12## wherein b is 3, 4, 5 or 6 and x is 2 or 3.
Claim 3
Dependent Claim
47 words
A compound having the formula ##STR13## wherein R F represents a straight chain or branched perfluoroalkyl radical of from 1 to 10 carbon atoms; a is 1 or 2, b is 3, 4 or 5 and a + b ≦ 6 and x is 2 or 3.
Claim 4
Dependent Claim
47 words
A compound having the formula ##STR13## wherein R F represents a straight chain or branched perfluoroalkyl radical of from 1 to 10 carbon atoms; a is 1 or 2, b is 3, 4 or 5 and a + b ≦ 6 and x is 2 or 3.
Claim 5
Dependent Claim
6 words
A compound having the formula ##STR14##
Claim 6
Dependent Claim
6 words
A compound having the formula ##STR14##
Claim 7
Dependent Claim
6 words
A compound having the formula ##STR15##
Claim 8
Dependent Claim
6 words
A compound having the formula ##STR15##
Claim 9
Dependent Claim
6 words
A compound having the formula ##STR16##
Claim 10
Dependent Claim
6 words
A compound having the formula ##STR16##
References Cited (Backward Citations)
US2567569A
Cited
US3621066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |