Patent US4101429A successfully refreshed from Google Patents.
US4101429A
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Lubricant compositions
Assignee: Shell USA Inc
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Filing: 1977-07-21
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Granted: 1978-07-18
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Expires: 1997-07-21
Abstract
Abstract Lubricating oil compositions are provided which comprise: (A) a major amount of oil of lubricating viscosity, and (B) an effective amount dissolved therein of each of (1) a zinc primary dihydrocarbyl dithiophosphate; (2) a mixture of (a) certain dimeric acids and (b) the reaction product of a monocarboxylic acid, certain polyalkylene polyamines and an alkenyl succinic anhydride; and (3) a substantially neutral zinc salt of a dihydrocarbyl sulfonic acid. These lubricating oil compositions are useful as functional fluids in a variety of systems as coolants, hydraulic fluids, turbine oils, spindle oils and the like.
Inventors
- 👤 August H. Birke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:58
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2205/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10M2229/051; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/08; C10N2040/135
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A lubricating oil composition comprising: a major amount of an oil of lubricating viscosity and containing dissolved therein (1) from about 0.25 to about 1.75 weight percent of a zinc dialkyl dithiophosphate; from about 0.07 to about 0.5 parts per part by weight of said zinc dithiophosphate of a mixture of (a) a dimeric acid produced by the condensation of unsaturated aliphatic monocarboxylic acids having between about 16 and 18 carbon atoms per molecule, and (b) the reaction product obtained by reacting a monocarboxylic acid, a polyalkylene polyamine having more than one nitrogen atom per molecule, and an alkenyl succinic anhydride in a weight ratio of (a) to (b) from about 0.001 to 50 to about 15:0.001; and from 0.035 to about 0.25 parts of a substantially neutral zinc salt of a dialkylated aromatic sulfonic acid per part by weight of said zinc dithiophosphate.
Claim 2
Dependent Claim
144 words
A lubricating oil composition comprising: a major amount of an oil of lubricating viscosity and containing dissolved therein (1) from about 0.25 to about 1.75 weight percent of a zinc dialkyl dithiophosphate; from about 0.07 to about 0.5 parts per part by weight of said zinc dithiophosphate of a mixture of (a) a dimeric acid produced by the condensation of unsaturated aliphatic monocarboxylic acids having between about 16 and 18 carbon atoms per molecule, and (b) the reaction product obtained by reacting a monocarboxylic acid, a polyalkylene polyamine having more than one nitrogen atom per molecule, and an alkenyl succinic anhydride in a weight ratio of (a) to (b) from about 0.001 to 50 to about 15:0.001; and from 0.035 to about 0.25 parts of a substantially neutral zinc salt of a dialkylated aromatic sulfonic acid per part by weight of said zinc dithiophosphate.
Claim 3
Dependent Claim
32 words
A lubricating oil composition as in claim 1 wherein the zinc dithiophosphate is a zinc salt of a dialkyl dithiophosphonic acid wherein the alkyl groups contain from 4 to 12 carbon atoms.
Claim 4
Dependent Claim
16 words
A lubricating oil composition as in claim 1 wherein the dimer acid is dimerized linoleic acid.
Claim 5
Dependent Claim
36 words
A lubricating oil composition as in claim 1 wherein the substantially neutral zinc salt is zinc dinonyl napthalene sulfonate and is present in an amount between about 0.04 and 0.20 parts per part of zinc dithiophosphate.
Claim 6
Dependent Claim
18 words
A lubricating oil composition as in claim 1 wherein the oil is a paraffinic or naphthenic mineral oil.
Claim 7
Dependent Claim
20 words
A lubricating oil composition as in claim 1 wherein the pour point depressant and an antifoam agent are also present.
References Cited (Backward Citations)
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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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |