US4043926A
Expired / Lapsed
US
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Lubricant composition
Assignee: United States Department of the Air Force
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Filing: 1976-04-30
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Granted: 1977-08-23
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Expires: 1996-04-30
Abstract
Abstract A lubricant comprising a perfluorinated polyalkylether base fluid and a minor amount of a perfluoroalkylether substituted aryl phosphine.
Inventors
- 👤 Carl E. Snyder, Jr.
- 👤 Christ Tamborski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
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: 12
Claim 1
Independent Claim
47 words
A lubricant composition comprising (1) a perfluorinated polyalkylether base fluid and (2) a corrosion inhibiting amount of a phosphine compound having the following formula: ##STR9## 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
47 words
A lubricant composition comprising (1) a perfluorinated polyalkylether base fluid and (2) a corrosion inhibiting amount of a phosphine compound having the following formula: ##STR9## 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
31 words
The lubricant composition according to claim 1 in which the amount of the phosphine compound ranges from about 0.05 to 5 weight percent, based upon the weight of the base fluid.
Claim 4
Dependent Claim
31 words
The lubricant composition according to claim 1 in which the amount of the phosphine compound ranges from about 0.5 to 2.0 weight percent, based upon the weight of the base fluid.
Claim 5
Dependent Claim
46 words
The lubricant composition according to claim 1 in which the perfluorinated polyalkylether base fluid is a compound having the following formula: ##STR10## where R f is a perfluoroalkyl group containing 2 or 3 carbon atoms and n is an integer ranging from 5 to 50, inclusive.
Claim 6
Dependent Claim
33 words
The lubricant composition according to claim 4 in which the R group of the phosphine compound is ##STR11## where x, y and z are zero or an integer from 1 to 20, inclusive.
Claim 7
Dependent Claim
17 words
The lubricant composition according to claim 5 in which the phosphine compound has the following formula: ##STR12##
Claim 8
Dependent Claim
17 words
The lubricant composition according to claim 5 in which the phosphine compound has the following formula: ##STR13##
Claim 9
Dependent Claim
17 words
The lubricant composition according to claim 5 in which the phosphine compound has the following formula: ##STR14##
Claim 10
Dependent Claim
17 words
The lubricant composition according to claim 5 in which the phosphine compound has the following formula: ##STR15##
Claim 11
Dependent Claim
17 words
The lubricant composition according to claim 5 in which the phosphine compound has the following formula: ##STR16##
Claim 12
Dependent Claim
17 words
The lubricant composition according to claim 5 in which the phosphine compound has the following formula: ##STR17##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |