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US4094800A
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Anti-wear lubricating oil compositions
Assignee: Ethyl Corp
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Filing: 1977-05-09
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Granted: 1978-06-13
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Expires: 1997-05-09
Abstract
Abstract Disclosed are lubricating oil compositions having improved anti-wear properties, comprising a major portion of a lubricating oil and an effective amount of an oil soluble additive combination comprising a basic zinc alkyl dithiophosphate having alkyl groups made from primary alcohols containing from about 6 to about 20 carbon atoms and a non-acidic lubricating oil anti-rust compound comprising a succinic anhydride substituted with an alkenyl group which has about 8 to about 50 carbon atoms reacted with an alcohol, an amine, or mixtures thereof. The zinc dithiophosphate is generally made from primary alcohol containing about 7 to about 12 carbon atoms and generally has a zinc to phosphorous ratio of about 1.15-1.5:1.
Inventors
- 👤 Thomas M. Warne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:06
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/404; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A lubricating oil composition having improved anti-wear properties comprising a major portion of lubricating oil and an effective amount of an oil soluble additive composition comprising a basic zinc alkyl dithiophosphate having alkyl groups made from primary alcohols containing from about 6 to about 20 carbon atoms and a nonacidic lubricant anti-rust compound comprising the reaction product of a succinic anhydride substituted with an alkenyl group which has 8 to 20 carbon atoms and an alcohol, an amine or mixtures thereof, wherein the ratio of zinc alkyl dithiophosphate to anti-rust is about 1-50:1.
Claim 2
Dependent Claim
93 words
A lubricating oil composition having improved anti-wear properties comprising a major portion of lubricating oil and an effective amount of an oil soluble additive composition comprising a basic zinc alkyl dithiophosphate having alkyl groups made from primary alcohols containing from about 6 to about 20 carbon atoms and a nonacidic lubricant anti-rust compound comprising the reaction product of a succinic anhydride substituted with an alkenyl group which has 8 to 20 carbon atoms and an alcohol, an amine or mixtures thereof, wherein the ratio of zinc alkyl dithiophosphate to anti-rust is about 1-50:1.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the zinc dithiophosphate is made from primary alcohols containing about 7 to about 12 carbon atoms.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein the zinc dithiophosphate has a zinc diphosphorous ratio of about 1.15-1.5:1.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein the zinc dithiophosphate has a zinc diphosphorous ratio of about 1.15-1.35:1.
Claim 6
Dependent Claim
22 words
The composition of claim 1 wherein the alkenyl group of the substituted succinic anhydride has from 10 to about 20 carbon atoms.
Claim 7
Dependent Claim
19 words
The composition of claim 1 wherein the alcohol is an alcohol from about 2 to about 30 carbon atoms.
Claim 8
Dependent Claim
20 words
The composition of claim 6 wherein the alcohol is an alcohol of from about 4 to about 20 carbon atoms.
Claim 9
Dependent Claim
17 words
The composition of claim 1 wherein the amine has from about 2 to about 30 carbon atoms.
Claim 10
Dependent Claim
17 words
The composition of claim 8 wherein the amine has from about 4 to about 20 carbon atoms.
Claim 11
Dependent Claim
21 words
The composition of claim 8 wherein the amine is a polyamine which has from about 2 to about 18 carbon atoms.
Claim 12
Dependent Claim
25 words
The composition of claim 1 wherein the oil soluble additive combination is present at a concentration of from about 0.05 to about 5 weight percent.
Claim 13
Dependent Claim
25 words
The composition of claim 11 wherein the oil soluble additive combination is present in a concentration of from about 0.10 to about 2 weight percent.
Claim 14
Dependent Claim
29 words
The composition of claim 1 wherein the lubricating oil has a viscosity from about 40 Saybolt Universal Seconds at 100° up to about 200 Saybolt Universal Seconds at 10°.
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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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |