US2543735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating composition
Assignee: California Research LLC
•
Filing: 1949-08-19
•
Granted: 1951-02-27
•
Expires: 1969-08-19
Abstract
No abstract record available.
Inventors
- 👤 William T Stewart
- 👤 James O Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:02
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C11; C11B; C11B5/00; C11B5/0078; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/16; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/109; C10M2219/00; C10M2219/02; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/14; C10N2010/16; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13; C10N2040/135; C10N2040/14; C10N2040/16; C10N2040/17; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A LUBRICANT COMPRISING A MAJOR PROPORTION OF AN OXIDIZABLE POLYETHER OIL OF LUBRICATING VISCOSITY, WHICH OIL IS SUBSTANTIALLY FREE FROM GROUPS NORMALLY REACTIVE WITH SELENOMERCAPTANS AND TELLUROMERCAPTANS, SAID OXIDIZABLE OIL CONTAINING A SMALL AMOUNT, SUFFICIENT TO INHIBIT OXIDATION OF SAID OIL OF A COMPOUND OF THE STRUCTURE
Claim 2
Dependent Claim
47 words
A LUBRICANT COMPRISING A MAJOR PROPORTION OF AN OXIDIZABLE POLYETHER OIL OF LUBRICATING VISCOSITY, WHICH OIL IS SUBSTANTIALLY FREE FROM GROUPS NORMALLY REACTIVE WITH SELENOMERCAPTANS AND TELLUROMERCAPTANS, SAID OXIDIZABLE OIL CONTAINING A SMALL AMOUNT, SUFFICIENT TO INHIBIT OXIDATION OF SAID OIL OF A COMPOUND OF THE STRUCTURE
References Cited (Backward Citations)
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US2434978A
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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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |