Patent US4011267A successfully refreshed from Google Patents.
US4011267A
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Perfluoroalkylether substituted aryl phosphines and their synthesis
Assignee: United States Department of the Air Force
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Filing: 1975-11-06
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Granted: 1977-03-08
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Expires: 1995-11-06
Abstract
Abstract Fluorinated phosphines having the following formula: ##STR1## , where R is a perfluoroalkylether group of fluorine with two of the R's being fluorine, and n is 1, 2 or 3. The fluorinated phosphines are especially useful as anticorrosion and antioxidation additives for perfluorinated fluids.
Inventors
- 👤 Christ Tamborski
- 👤 Carl E. Snyder, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:03
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C45/00; C07C45/45; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5022; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/04; C10M2213/06; C10M2213/062; C10M2223/00; C10M2223/06; C10M2223/061; C10M2225/00; C10M2225/02; C10N; C10N2030/00; C10N2030/08; C10N2030/12; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13; C10N2040/20; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
A fluorinated phosphine having the following formula: ##STR14## where one of the R's is a perfluoroalkylether group, two of the R's are fluorine, and n is 1, 2 or 3.
Claim 2
Dependent Claim
30 words
A fluorinated phosphine having the following formula: ##STR14## where one of the R's is a perfluoroalkylether group, two of the R's are fluorine, and n is 1, 2 or 3.
Claim 3
Dependent Claim
55 words
The fluorinated phosphine of claim 1 in which the perfluoroalkylether group is ##STR15## C 2 F 5 O(C 2 F 4 O) y CF 2 CF 2 --; or CF 3 O(CF 2 O) z CF 2 CF 2 --; where x, y and z is zero or an integer from 1 to 20 inclusive.
Claim 4
Dependent Claim
25 words
The fluorinated phosphine of claim 2 in which the perfluoroalkylether group is C 3 F 7 OCF(CF 3 )CF 2 -- and n is 3.
Claim 5
Dependent Claim
29 words
The fluorinated phosphine of claim 2 in which the perfluoroalkylether group is C 3 F 7 OCF(CF 3 )CF 2 OCF(CF 3 )CF 2 -- and n is 3.
Claim 6
Dependent Claim
31 words
The fluorinated phosphine of claim 2 in which the perfluoroalkylether group is C 3 F 7 O[CF(CF 3 )CF 2 O] 4 CF(CF 3 )CF 2 -- and n is 3.
Claim 7
Dependent Claim
31 words
The fluorinated phosphine of claim 2 in which the perfluoroalkylether group is C 2 F 5 O(C 2 F 4 O) 2 CF 2 CF 2 -- and n is 3.
Claim 8
Dependent Claim
27 words
The fluorinated phosphine of claim 2 in which the perfluoroalkylether group is CF 3 O(CF 2 O) 3 CF 2 CF 2 -- and n is 3.
Claim 9
Dependent Claim
31 words
The fluorinated phosphine of claim 2 in which the perfluoroalkylether group is C 3 F 7 O[CF(CF 3 )CF 2 O] 4 CF(CF 3 )CF 2 -- and n is 1.
References Cited (Backward Citations)
US3201445A
Cited
US3393151A
Cited
US3481872A
Cited
US3306855A
Cited
US3483129A
Cited
US3499041A
Cited
US3567802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |