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US4185031A
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Fluorinated phosphinic acids
Assignee: United States Department of the Air Force
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Filing: 1978-09-27
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Granted: 1980-01-22
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Expires: 1998-09-27
Abstract
Abstract Fluorinated phosphinic acids prepared by reaction of fluorinated olefins with an acid containing one or more P-H bonds in the presence of a free radical initiator. The reaction products of the acids with various metal centers are effective grease thickeners for liquid lubricants.
Inventors
- 👤 Hyman D. Gillman
- 👤 James P. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:44
CPC Classifications
C; C10; C10M; C10M115/00; C10M115/12; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/301; C07F9/304; C10M2213/00; C10M2213/04; C10M2213/06; C10M2223/00; C10M2223/06; C10M2223/061; C10M2229/00; C10M2229/04; C10M2229/042
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
A fluorinated phosphinic acid having the following formula: R(R.sub.f CH.sub.2 CH.sub.2)P(O)OH, wherein R is alkyl or aryl and R f is perfluoroalkyl.
Claim 2
Dependent Claim
22 words
A fluorinated phosphinic acid having the following formula: R(R.sub.f CH.sub.2 CH.sub.2)P(O)OH, wherein R is alkyl or aryl and R f is perfluoroalkyl.
Claim 3
Dependent Claim
40 words
The fluorinated phosphinic acid according to claim 1 in which R is aryl, and R f is (CF 3 ) 2 CF(CF 2 CF 2 ) x , where x is zero or an integer from 1 to 4, inclusive.
Claim 4
Dependent Claim
26 words
The fluorinated phosphinic acid according to claim 2 in which R is phenyl and R f is (CF 3 ) 2 CF(CF 2 ) 4 .
Claim 5
Dependent Claim
26 words
The fluorinated phosphinic acid according to claim 2 in which R is phenyl and R f is (CF 3 ) 2 CF(CF 2 ) 6 .
References Cited (Backward Citations)
DE1443533A1
Cited
US3719448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |