US4132660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease compositions
Assignee: United States Department of the Air Force
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Filing: 1978-03-01
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Granted: 1979-01-02
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Expires: 1998-03-01
Abstract
Abstract An antirust, anticorrosion grease composition comprising a major proportion of a perfluorinated polyalkylether base fluid, a minor proportion of a fluorocarbon polymer thickening agent, and a rust and corrosion inhibiting amount of a fluorine-containing benzoxazole.
Inventors
- 👤 John B. Christian
- 👤 Christ Tamborski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:38
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/38; C10M133/44; C10M107/00; C10M107/38; C10M119/00; C10M119/22; C10M133/48; C10M169/00; C10M2213/00; C10M2213/02; C10M2213/023; C10M2213/04; C10M2213/043; C10M2213/06; C10M2213/0606; C10M2213/062; C10M2213/0623; C10M2215/00; C10M2215/22; C10M2215/225; C10M2215/227
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A grease composition comprising a major amount of a perfluorinated polyalkylether base fluid, a minor amount of a fluorocarbon polymer thickening agent for the base fluid, and a rust and corrosion inhibiting amount of a fluorine-containing benzoxazole having the following structural formula: ##STR23## wherein R f is perfluoroalkyl, perfluoroalkylether, or ##STR24## in which R f ' is perfluoroalkylene or perfluoroalkyleneether and Y is perfluoroalkyl, perfluoroalkylether or hydrogen.
Claim 2
Dependent Claim
67 words
A grease composition comprising a major amount of a perfluorinated polyalkylether base fluid, a minor amount of a fluorocarbon polymer thickening agent for the base fluid, and a rust and corrosion inhibiting amount of a fluorine-containing benzoxazole having the following structural formula: ##STR23## wherein R f is perfluoroalkyl, perfluoroalkylether, or ##STR24## in which R f ' is perfluoroalkylene or perfluoroalkyleneether and Y is perfluoroalkyl, perfluoroalkylether or hydrogen.
Claim 3
Dependent Claim
227 words
The grease composition according to claim 1 in which the perfluorinated polyalkylether base fluid is a compound selected from the group consisting of compounds having the following formulas: ##STR25## where R' is a perfluoroalkyl containing 2 or 3 carbon atoms, n is an integer ranging from 5 to 50, inclusive, P, Q and R are average indices of composition and only P and/or R can be zero, the sum P+Q+R has a value of between 2 and 200, the ratio P/(Q+R) has a value of from 0 to 50, the ratio R/Q has a value of from 0 to 10, X and Y are terminal groups selected from the group consisting of --CF 3 , --C 2 F 5 , --C 3 F 7 and ##STR26## provided that both terminal groups X and Y are --CF 3 when both indices P and R are equal to zero, the terminal groups are the same or different from each other and are selected from the group consisting of --CF 3 and --C 2 F 5 when only index P is zero, and when P is different from zero, the two terminal groups are the same or different from each other and selected from the group consisting of --CF 3 , --C 2 F 5 and --C 3 F 7 , or one of the terminal groups may be ##STR27##
Claim 4
Dependent Claim
19 words
The grease composition according to claim 2 in which the thickening agent is a fluorinated ethylene-propylene copolymer or polytetrafluoroethylene.
Claim 5
Dependent Claim
48 words
The grease composition according to claim 3 which comprises about 65 to 72 weight percent of the base fluid, about 26.5 to 34.5 weight percent of the thickening agent, and about 0.5 to 1.5 weight percent of the fluorine-containing benzoxazole, based upon a total of 100 weight percent.
Claim 6
Dependent Claim
17 words
The grease composition according to claim 4 in which R f is perfluoroalkylether and Y is hydrogen.
Claim 7
Dependent Claim
13 words
The grease composition according to claim 5 in which the perfluoroalkylether is ##STR28##
Claim 8
Dependent Claim
17 words
The grease composition according to claim 4 in which R f is perfluoroalkyl and Y is hydrogen.
Claim 9
Dependent Claim
17 words
The grease composition according to claim 7 in which the perfluoroalkyl is C 8 F 17 .
Claim 10
Dependent Claim
15 words
The grease composition according to claim 4 in which R f and Y are perfluoroalkyls.
Claim 11
Dependent Claim
17 words
The grease composition according to claim 9 in which each perfluoroalkyl is C 3 F 7 .
Claim 12
Dependent Claim
17 words
The grease composition according to claim 4 in which R f is ##STR29## and Y is H.
Claim 13
Dependent Claim
21 words
The grease composition according to claim 4 in which R f is ##STR30## and Y is C 3 F 7 .
References Cited (Backward Citations)
US3525690A
Cited
US4071459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |