US4259192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions containing polyether dithiophosphates
Assignee: Chevron USA Inc
•
Filing: 1979-04-02
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Granted: 1981-03-31
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Expires: 1999-04-02
Abstract
Abstract Oil-soluble dithiophosphate esters of a dithiophosphoric acid and a poly(oxyalkylene) alcohol, and salts thereof, are provided for lubricating oil compositions.
Inventors
- 👤 Jennifer E. Lilburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:06
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/028; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2225/00; C10M2225/02; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/08; C10N2010/14; C10N2010/16; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity derived from petroleum sources and a minor amount of the zinc salt of a dithiophosphate ester of a dithiophosphoric acid and a hydrocarbyl-terminated poly(oxyalkylene) alcohol, wherein said hydrocarbyl-terminated poly(oxyalkylene) alcohol is of molecular weight of from about 200 to 10,000 and is composed of about 8-100 oxyalkylene units selected from 3 to 5 carbon atom oxyalkylene units, at least a sufficient number of which are branched-chain oxyalkylene units to render said zinc salt soluble in an oil of lubricating viscosity, and said hydrocarbyl group contains from 1 to 30 carbon atoms.
Claim 2
Dependent Claim
105 words
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity derived from petroleum sources and a minor amount of the zinc salt of a dithiophosphate ester of a dithiophosphoric acid and a hydrocarbyl-terminated poly(oxyalkylene) alcohol, wherein said hydrocarbyl-terminated poly(oxyalkylene) alcohol is of molecular weight of from about 200 to 10,000 and is composed of about 8-100 oxyalkylene units selected from 3 to 5 carbon atom oxyalkylene units, at least a sufficient number of which are branched-chain oxyalkylene units to render said zinc salt soluble in an oil of lubricating viscosity, and said hydrocarbyl group contains from 1 to 30 carbon atoms.
Claim 3
Dependent Claim
22 words
A concentrate comprising an inert stable oleophilic organic solvent and from 10 to 80 weight percent of the composition of claim 1.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |