US2833713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibited motor oils
Assignee: Standard Oil Co
•
Filing: 1955-04-18
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Granted: 1958-05-06
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Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Norman E Lemmond
- 👤 Hurley D Cook
- 👤 Walter W Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:52
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/10; C10M2209/103; C10M2219/00; C10M2219/02; C10M2219/024; C10M2223/00; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10M2225/041; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/12; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A HYDROCARBON LUBRICATING OIL AND FROM ABOUT 0.05% TO ABOUT 3% OF A MIXTURE COMPRISING ESSENTIALLY POLYMERIC LONG CHAIN UNSATURATED POLYBASIC CARBOXYLIC ACIDS, SAID ACID MIXTURE COMPRISING MONOMERS, DIMERS, TRIMERS AND HIGHER FATTY ACID POLYMEES IN THE RATIO OF FROM ABOUT 45% TO ABOUT 55% OF A MONOMER AND DIMER FRACTION HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 300 TO ABOUT 600 AND FROM ABOUT 45% TO ABOUT 55% OF A TRIMER AND HIGHER POLYMER FRACTION HAVING A MOLECULAR WEIGHT IN EXCESS OF 600 AND FROM ABOUT 0.002% TO ABOUT 10% OPF AN ALKALINE EARTH-CONTAINING NEUTRALIZED REACTION PRODUCT OF A PHOSPHORUS SULFIDE AND AN OLEFIN POLYMER.
Claim 2
Dependent Claim
118 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A HYDROCARBON LUBRICATING OIL AND FROM ABOUT 0.05% TO ABOUT 3% OF A MIXTURE COMPRISING ESSENTIALLY POLYMERIC LONG CHAIN UNSATURATED POLYBASIC CARBOXYLIC ACIDS, SAID ACID MIXTURE COMPRISING MONOMERS, DIMERS, TRIMERS AND HIGHER FATTY ACID POLYMEES IN THE RATIO OF FROM ABOUT 45% TO ABOUT 55% OF A MONOMER AND DIMER FRACTION HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 300 TO ABOUT 600 AND FROM ABOUT 45% TO ABOUT 55% OF A TRIMER AND HIGHER POLYMER FRACTION HAVING A MOLECULAR WEIGHT IN EXCESS OF 600 AND FROM ABOUT 0.002% TO ABOUT 10% OPF AN ALKALINE EARTH-CONTAINING NEUTRALIZED REACTION PRODUCT OF A PHOSPHORUS SULFIDE AND AN OLEFIN POLYMER.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |