Patent US2934499A successfully refreshed from Google Patents.
US2934499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oils containing extreme pressure agents
Assignee: California Research LLC
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Filing: 1957-07-26
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Granted: 1960-04-26
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Expires: 1977-07-26
Abstract
No abstract record available.
Inventors
- 👤 Goldschmidt Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2203/00; C10M2203/06; C10M2203/10; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10M2209/109; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY HAVING INCORPORATED THEREIN A DETERGENT SELECTED FROM THE GROUP CONSISTING OF METAL SULFONATES AND METAL PHENATES, FROM 0.2% TO 2%, BY WEIGHT, OF AN ALKANOL NAPHTHENAMIDE CONTAINING FROM 2 TO 10 CARBON ATOMS IN THE ALKANOL RADICAL AND WHEREIN THE NAPHTHENIC ACID RADICAL IS DERIVED FROM PETROLEUM NAPTHENIC ACID HAVING MOLECULAR WEIGHTS FROM 200 TO 500 AND HAVING NEUTRALIZATION NUMBERS FROM 100 TO 300, AND FORM 0.25% TO 5%, BY WEIGHT, OF A METAL SALT OF A DITHIOPHOSPHORIC ACID OF THE FORMULA:
Claim 2
Dependent Claim
96 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY HAVING INCORPORATED THEREIN A DETERGENT SELECTED FROM THE GROUP CONSISTING OF METAL SULFONATES AND METAL PHENATES, FROM 0.2% TO 2%, BY WEIGHT, OF AN ALKANOL NAPHTHENAMIDE CONTAINING FROM 2 TO 10 CARBON ATOMS IN THE ALKANOL RADICAL AND WHEREIN THE NAPHTHENIC ACID RADICAL IS DERIVED FROM PETROLEUM NAPTHENIC ACID HAVING MOLECULAR WEIGHTS FROM 200 TO 500 AND HAVING NEUTRALIZATION NUMBERS FROM 100 TO 300, AND FORM 0.25% TO 5%, BY WEIGHT, OF A METAL SALT OF A DITHIOPHOSPHORIC ACID OF THE FORMULA:
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |