US2734865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized lubricating compositions
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:48
CPC Classifications
C; C10; C10M; C10M137/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/047; C10M2223/12; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A HYDROCARBON MINERAL LUBRICATING OIL COMPOSITION COMPRISING A HYDROCARBON MINERAL LUBRICATING OIL AND AS AN ANTIOXIDANT AND ANTICORROSIVE AGENT HAVING A TENDENCY TOWARD HEAT INSTABILITY AND THE FORMATION OF SLUDGE UPON CONTINUED HEATING THEREOF AT HIGH TEMPERATURES, 0.1-3.0% BY WEIGHT OF A DITHIOPHOSPHATE HAVING THE FORMULA:
Claim 2
Dependent Claim
46 words
A HYDROCARBON MINERAL LUBRICATING OIL COMPOSITION COMPRISING A HYDROCARBON MINERAL LUBRICATING OIL AND AS AN ANTIOXIDANT AND ANTICORROSIVE AGENT HAVING A TENDENCY TOWARD HEAT INSTABILITY AND THE FORMATION OF SLUDGE UPON CONTINUED HEATING THEREOF AT HIGH TEMPERATURES, 0.1-3.0% BY WEIGHT OF A DITHIOPHOSPHATE HAVING 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) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |