US5366646A
Expired / Lapsed
US
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Lubricating oil composition
Assignee: Tonen General Sekiyu KK
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Filing: 1993-04-27
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Granted: 1994-11-22
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Expires: 2013-04-27
Abstract
Abstract The invention concerns a lubricating oil composition in which a lubricating oil base contains 0.1% by weight to 20% by weight of an aromatic glycidyl carboxylate having the following general formula (1): ##STR1## wherein R is a C 6-14 aryl or alkylaryl group, and n represents an integer of 1 or 2, and/or 0.05% by weight to 10% by weight of a phosphonate type additive having the following general formula (2): ##STR2## where R 1 or R 2 is selected from the group consisting of alkyl, aralkyl, aryl and hydroxyalkyl groups that may or may not have a substitute, and two R 2 groups may be identical with or different from each other, and which is excellent in stability to hydrolysis, heat and oxidation as well as in lubricating properties, and so provides a particularly excellent refrigerating oil composition.
Inventors
- 👤 Takehisa Sato
- 👤 Toshiaki Kuribayashi
- 👤 Hironari Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:34
CPC Classifications
C; C10; C10M; C10M171/00; C10M171/008; C10M105/00; C10M105/08; C10M105/32; C10M105/38; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M129/00; C10M129/02; C10M129/16; C10M129/18; C10M129/66; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C10M133/14; C10M133/38; C10M133/44; C10M137/00; C10M137/12; C10M137/14; C10M141/00; C10M141/10; C10M169/00; C10M169/04; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/026; C10M2205/14; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/10; C10M2207/24; C10M2207/28; C10M2207/2805; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/2835; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/30; C10M2207/302; C10M2207/34; C10M2207/345; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/101; C10M2209/1013; C10M2209/102; C10M2209/1023; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2215/068; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2223/00; C10M2223/06; C10M2223/061; C10M2223/065; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/05; C10M2229/051; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/06; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
A lubricating oil composition comprising a lubricating oil base containing 0.1 to 20% by weight of an aromatic glycidyl carboxylate of the formula ##STR21## wherein R is an aryl or alkylaryl group having 6 to 14 carbon atoms and n is 1 or 2.
Claim 2
Dependent Claim
44 words
A lubricating oil composition comprising a lubricating oil base containing 0.1 to 20% by weight of an aromatic glycidyl carboxylate of the formula ##STR21## wherein R is an aryl or alkylaryl group having 6 to 14 carbon atoms and n is 1 or 2.
Claim 3
Dependent Claim
47 words
A lubricating oil composition according to claim 1 further comprising 0.05 to 10% by weight of a phosphonate additive of the formula ##STR22## wherein R 1 and R 2 may be substituted and are each selected from the group consisting of alkyl, aralkyl, aryl and hydroxyalkyl groups.
Claim 4
Dependent Claim
88 words
A lubricating oil composition according to claim 2 further comprising 0.01 to 5% by weight of a benzotriazole compound of the formula ##STR23## where R 1 is an alkyl or aryl group having 1 to 6 carbon atoms, R 2 is an alkylene or arylene group having 1 to 6 carbon atoms, R 3 and R 4 are each an alkyl, aryl or alkylaryl group having 1 to 12 carbon atoms, or R 3 and R 4 taken together form a heterocycle, and n is 0 or 1.
Claim 5
Dependent Claim
43 words
A lubricating oil composition as claimed in claim 1, 2 or 3, which is a refrigerating machine oil wherein the lubricating oil base is an ester oil having a viscosity in the range of 10 to 500 mm 2 /s at 40° C.
Claim 6
Dependent Claim
43 words
A lubricating oil composition as claimed in claim 1, 2 or 3, which is a refrigerating machine oil wherein the lubricating oil base is a polyether oil having a viscosity in the range of 10 to 500 mm 2 /s at 40° C.
References Cited (Backward Citations)
US3472775A
Cited
US3859318A
Cited
US3723320A
Cited
US4076642A
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JPS5763395A
Cited
EP0377122A1
Cited
EP0452816A2
Cited
EP0460613A1
Cited
EP0460614A1
Cited
EP0470788A1
Cited
EP0475751A1
Cited
EP0499793A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-21 | 2006-05-23 | 2006-11-22 | $7700.00 | Window Closed / Lapsed |