US2945810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions containing bi-metal dithiophosphates
Assignee: California Research LLC
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Filing: 1956-12-31
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Granted: 1960-07-19
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 James H Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:37
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2227/00; C10M2227/02; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/06; C10N2040/135; C10N2040/25; C10N2040/252; C10N2040/253; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A LUBRICATING OIL COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL, AND FROM ABOUT 0.25% TO ABOUT 20%, BY WEIGHT, OF A BI-METAL SALT OF A DITHIOPHOSPHORIC ACID, WHEREIN SAID BI-METAL SALT IS PREPARED BY REACTING BARIU, OXIDE WITH A ZINC SALT OF A DIESTER OF DITHIOPHOSPHORIC ACID OF THE FORMULA:
Claim 2
Dependent Claim
52 words
A LUBRICATING OIL COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL, AND FROM ABOUT 0.25% TO ABOUT 20%, BY WEIGHT, OF A BI-METAL SALT OF A DITHIOPHOSPHORIC ACID, WHEREIN SAID BI-METAL SALT IS PREPARED BY REACTING BARIU, OXIDE WITH A ZINC SALT OF A DIESTER OF DITHIOPHOSPHORIC ACID OF THE FORMULA:
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |