US4443349A
Expired / Lapsed
US
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Fluorinated aliphatic polyalkylether lubricant with an additive composed of an aromatic phosphine substituted with perfluoroalkylether groups
Assignee: United States, REPRESENTED BY SECRETARY OF UNITED STATES AIR FORCE
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Filing: 1982-09-14
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Granted: 1984-04-17
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Expires: 2002-09-14
Abstract
Abstract A lubricant composition comprising a base fluid having the general formula F[CF(CF3)CF2O]nCHFCF3 wherein n is an integer, and a corrosion inhibiting amount of an aromatic phosphine with perfluorinated polyalkylether substituents having the general formula <IMAGE> wherein RfORf- is a perfluoroalkylether group containing at least one ether linkage.
Inventors
- 👤 Carl E. Snyder, Jr.
- 👤 Christ Tamborski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:25
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M107/00; C10M107/38; C10M137/00; C10M137/12; C10M2213/00; C10M2213/02; C10M2213/023; C10M2213/04; C10M2213/043; C10M2213/06; C10M2213/0606; C10M2213/062; C10M2213/0623; C10M2223/00; C10M2223/06; C10M2223/061; C10M2223/065
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
64 words
A lubricant composition comprising (1) a base fluid consisting essentially of a fluorinated polymer having the formula F[CF(CF.sub.3)CF.sub.2 O].sub.n CHFCF.sub.3 wherein n is an integer indicating the degree of polymerization and (2) a corrosion inhibiting amount of an aromatic phosphine with perfluorinated polyalkyether substituents having the formula ##STR4## wherein R f OR f -- is a perfluoroalkylether group containing at least one ether linkage.
Claim 2
Dependent Claim
64 words
A lubricant composition comprising (1) a base fluid consisting essentially of a fluorinated polymer having the formula F[CF(CF.sub.3)CF.sub.2 O].sub.n CHFCF.sub.3 wherein n is an integer indicating the degree of polymerization and (2) a corrosion inhibiting amount of an aromatic phosphine with perfluorinated polyalkyether substituents having the formula ##STR4## wherein R f OR f -- is a perfluoroalkylether group containing at least one ether linkage.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein the amount of said phosphine ranges from about 0.05 to 5 weight percent.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein the amount of said phosphine ranges from about 0.5 to 2 weight percent.
Claim 5
Dependent Claim
35 words
The composition of claim 1 wherein said R f OR f -- in said phosphine is C.sub.3 F.sub.7 O[CF(CF.sub.3)CF.sub.2 O].sub.x CF(CF.sub.3)-- wherein x is zero or an integer having a value of 1 to 20.
Claim 6
Dependent Claim
16 words
The composition of claim 4 wherein said x is in the range of 1 to 4.
Claim 7
Dependent Claim
10 words
The composition of claim 4 wherein said x is 1.
Claim 8
Dependent Claim
37 words
The composition of claim 1 wherein said R f OR f -- in said phosphine is C.sub.2 F.sub.5 O(CF.sub.2 CF.sub.2 O).sub.y CF.sub.2 -- wherein y is zero or an integer having a value of 1 to 20.
Claim 9
Dependent Claim
16 words
The composition of claim 7 wherein said y is in the range of 1 to 4.
Claim 10
Dependent Claim
35 words
The composition of claim 1 wherein said R f OR f -- in said phosphine is CF.sub.3 O(CF.sub.2 O).sub.z CF.sub.2 -- wherein z is zero or an integer having a value of 1 to 20.
Claim 11
Dependent Claim
16 words
The composition of claim 9 wherein said z is in the range of 1 to 4.
References Cited (Backward Citations)
US3393151A
Cited
US3481872A
Cited
US3306855A
Cited
US3483129A
Cited
US3499041A
Cited
US3567802A
Cited
US4011267A
Cited
US4043926A
Cited
US4097388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |