Patent US2620302A successfully refreshed from Google Patents.
US2620302A
Expired / Lapsed
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Lubricating oil compositions
Assignee: California Research LLC
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Filing: 1950-11-18
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Granted: 1952-12-02
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Expires: 1970-11-18
Abstract
No abstract record available.
Inventors
- 👤 Oliver L Harle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:13
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2209/00; C10M2209/10; C10M2209/101; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/108; C10M2209/109; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/089; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A LUBRICATING OIL COMPOSITION OF 1,2-POLYALKYLENE GLYCOL POLYMERIC MATERIAL HAVING IMPROVED RESISTANCE TO OXIDATION, COMPRISING A MAJOR PROPORTION OF A MIXTURE OF 1,2-POLYALKYLENE GLYCOL POLYMERIC MATERIAL OF LUBRICATING OIL VISDCOSITY NORMALLY SUSCEPTIBLE TO OXIDATION AND HYDROCARBON OIL IN AN AMOUNT, BY WEIGHT, OF SAID POLYMERIC MATERIAL OF ABOUT ONE-THIRD TO ABOUT THREE-FOLD THE AMOUNT OF SAID POLYMERIC MATERIAL, AND, SOLUBLE IN SAID MIXTURE, ABOUT 0.1% TO ABOUT 1% OF ZINC DITHIOCARBAMATE AND ABOUT 1% TO ABOUT 10% OF AN ALKALINE EARTH METAL SALT OF AN ALKYL-SUBSTITUTED PHENOL HAVING AT LEAST 4 TO 20 CARBON ATOMS IN A LEAST ONE ALKYL GROUP.
Claim 2
Dependent Claim
101 words
A LUBRICATING OIL COMPOSITION OF 1,2-POLYALKYLENE GLYCOL POLYMERIC MATERIAL HAVING IMPROVED RESISTANCE TO OXIDATION, COMPRISING A MAJOR PROPORTION OF A MIXTURE OF 1,2-POLYALKYLENE GLYCOL POLYMERIC MATERIAL OF LUBRICATING OIL VISDCOSITY NORMALLY SUSCEPTIBLE TO OXIDATION AND HYDROCARBON OIL IN AN AMOUNT, BY WEIGHT, OF SAID POLYMERIC MATERIAL OF ABOUT ONE-THIRD TO ABOUT THREE-FOLD THE AMOUNT OF SAID POLYMERIC MATERIAL, AND, SOLUBLE IN SAID MIXTURE, ABOUT 0.1% TO ABOUT 1% OF ZINC DITHIOCARBAMATE AND ABOUT 1% TO ABOUT 10% OF AN ALKALINE EARTH METAL SALT OF AN ALKYL-SUBSTITUTED PHENOL HAVING AT LEAST 4 TO 20 CARBON ATOMS IN A LEAST ONE ALKYL GROUP.
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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |