Patent US3856690A successfully refreshed from Google Patents.
US3856690A
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Lubricant compositions containing derivatives of anthranilic acid
Assignee: Mobil Oil AS
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Filing: 1973-03-01
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Granted: 1974-12-24
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Expires: 1993-03-01
Abstract
Abstract Lubricants are stabilized against oxidative degradation by adding thereto a stabilizing amount of an ester of an anthranilic acid. An example of a suitable material is n-octyl Nnaphthylanthranilate (n-octyl N-phenyl-1-naphthyl-2''carboxylate).
Inventors
- 👤 M Braid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:00
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
28 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR AMOUNT OF A LUBRICANT AND AN AMOUNT SUFFICIENT TO IMPART ANTIOXIDANT PROPERTIES THERETO OF AN ESTER OF ANTHRANILIC ACID HAVING THE FORMULA:
Claim 2
Dependent Claim
28 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR AMOUNT OF A LUBRICANT AND AN AMOUNT SUFFICIENT TO IMPART ANTIOXIDANT PROPERTIES THERETO OF AN ESTER OF ANTHRANILIC ACID HAVING THE FORMULA:
Claim 3
Dependent Claim
24 words
The composition of claim 1 wherein said ester is present in an amount of from about 0.005 percent to about 15 percent by weight.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein the ester has the formula
Claim 5
Dependent Claim
11 words
The composition of claim 3 wherein the -C8H17 group is n-C8H17.
Claim 6
Dependent Claim
10 words
The composition of claim 3 wherein the -C8H17 is 2,2,4-trimethylpentyl.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the ester has the formula
Claim 8
Dependent Claim
46 words
The composition of claim 1 wherein the lubricant contains, in addition to said ester p,p''-dioctyldiphenylamine in a ratio to said ester of from 4:1 to 1:4 when using said ester and said p, p''-dioctyldiphenylamine at concentrations of from 0.5 percent to about 15 percent by weight.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein the lubricant is a lubricating oil.
Claim 10
Dependent Claim
13 words
The composition of claim 8 wherein said oil is a synthetic ester oil.
Claim 11
Dependent Claim
23 words
The composition of claim 9 wherein said synthetic ester oil is an oil made from pentaerythritol and a mixture C5-C9 aliphatic monocarboxylic acids.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |