US2580005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricating compositions
Assignee: Standard Oil Development Co
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Filing: 1947-12-31
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Granted: 1951-12-25
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Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Cyphers
- 👤 George M Mcnulty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:01
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C10M2201/00; C10M2201/06; C10M2201/065; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2215/00; C10M2215/14; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2219/00; C10M2219/02; C10M2219/024; C10M2223/00; C10M2223/12; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A COMPOSITION CONSISTING ESSENTIALLY OF A MINERAL BASE LUBRICATING OIL CONTAINING ABOUT 1 TO 20% BY WEIGHT, BASED ON THE TOTAL COMPOSITION, OF AN EXTREME PRESSURE ADDITIVE, SAID ADDITIVE CONSISTING ESSENTIALLY OF A SULFURIZED FATTY OIL TREATED WITH ABOUT 0.5 TO 2%, BASED ON THE WEIGHT OF SAID SULFURIZED OIL, OF A PHOSPHORUS SULFIDE AT A TEMPERATURE RANGING BETWEEN 170* TO 210* F. FOR A PERIOD OF ABOUT 15 MINUTES OF ONE HOUR DURING WHICH THE PHOSPHORUS SULFIDE IS SUBSTANTIALLY DISPERSED IN SAID SULFURIZED FATTY OIL BUT SUBSTANTIALLY UNREACTED THEREWITH, SAID COMPOSITION INCLUDING ALSO ABOUT 0.1 TO 2%OF A METAL DEACTIVATOR.
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |