US3850824A
Expired / Lapsed
US
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Synthetic aircraft turbine oil
Assignee: Texaco Inc
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Filing: 1973-05-17
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Granted: 1974-11-26
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Expires: 1993-05-17
Abstract
Abstract Synthetic lubricating oil composition comprising a major portion of an aliphatic ester base oil having lubricating properties formed by the reaction of a pentaerythritol or trimethylolpropane and an organic monocarboxylic acid containing (a) from about 0.01 to 2.5 weight percent of an ammonium thiocyanate represented by the formula:
Inventors
- 👤 J Nebzydoski
- 👤 E Patmore
- 👤 I Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:35
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/06; C10M2215/064; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/22; C10M2215/221; C10M2215/222; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
59 words
A SYNTHETIC LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PORTION OF AN ALIPHATIC ESTER BASE OIL HAVING LUBRICATING PROPERTIES FORMED FROM THE REACTION OF A PENTAERYLTHRITOL OR TRIMETHYLOLPROPANE AND AN ORGANIC MONOCARBOXYLIC ACID HAVING FROM ABOUT 2 TO 18 CARBON ATOMS PER MOLECULE CONTAINING: A. FROM ABOUT 0.01 TO 2.5 WEIGHT PERCENT OF AN AMMONIUM THIOCYANATE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
59 words
A SYNTHETIC LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PORTION OF AN ALIPHATIC ESTER BASE OIL HAVING LUBRICATING PROPERTIES FORMED FROM THE REACTION OF A PENTAERYLTHRITOL OR TRIMETHYLOLPROPANE AND AN ORGANIC MONOCARBOXYLIC ACID HAVING FROM ABOUT 2 TO 18 CARBON ATOMS PER MOLECULE CONTAINING: A. FROM ABOUT 0.01 TO 2.5 WEIGHT PERCENT OF AN AMMONIUM THIOCYANATE REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
22 words
A lubricating oil composition according to claim 1 in which the concentration of said 3-amino-1H-1,2,4-triazole ranges from 0.005 to 0.05 weight percent.
Claim 4
Dependent Claim
20 words
A lubricating oil composition according to claim 1 containing from about 0.05 to 0.5 weight percent of said ammonium thiocyanate.
Claim 5
Dependent Claim
19 words
A lubricating oil composition according to claim 1 in which said ammonium thiocyanate is tert.-C18 22 alkyl ammonium thiocyanate.
Claim 6
Dependent Claim
19 words
A lubricating oil composition according to claim 1 in which said ammonium thiocyanate is tert.-C12 14 alkyl ammonium thiocyanate.
Claim 7
Dependent Claim
17 words
A lubricating oil composition according to claim 1 in which said ammonium thiocyanate is tert.-octyl ammonium thiocyanate.
Claim 8
Dependent Claim
38 words
A lubricating oil composition according to claim 1 containing from about 0.3 to 5 percent by weight of N-(4-tert.-octylphenyl)-1-naphthylamine, from about 0.3 to 5 weight percent of p,p'' -di-tert.-octyldiphenylamine and from about 0.25 to 10 percent of tricresylphosphate.
Claim 9
Dependent Claim
36 words
A lubricating oil composition according to claim 1 in which said aliphatic ester base oil is formed from the reaction of pentaerythritol with a mixture of aliphatic acids having from about 5 to 10 carbon atoms.
Claim 10
Dependent Claim
45 words
A lubricating oil composition according to claim 1 in which said aliphatic ester base oil comprises the reaction of pentaerythritol with substantial proportions of isovaleric, valeric, caproic, heptylic, caprylic and pelargonic acids in which the average acid carbon chain length is between 6 and 7.
Claim 11
Dependent Claim
69 words
A lubricating oil composition according to claim 1 in which said ester base oil is formed from pentaerythritol and saturated aliphatic acids having from 5 to 10 carbon atoms, said naphthylamine is monooctylphenylalpha naphthylamine at a concentration of 0.5 to 2.5 percent, said dialkyldiphenylamine is dioctyldiphenylamine at a concentration of 0.5 to 2 percent, and said trihydrocarbyl phosphate is tricresyl phosphate at a concentration of 0.5 to 5 percent.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |