US2542604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricant and extreme pressure agents therefor
Assignee: Standard Oil Development Co
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Filing: 1948-12-01
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Granted: 1951-02-20
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Expires: 1968-12-01
Abstract
No abstract record available.
Inventors
- 👤 Charles A Weisel
- 👤 Elmer B Cyphers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:16
CPC Classifications
C; C10; C10M; C10M137/00; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/047; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
A LUBRICATING OIL CONSISTING ESSENTIALLY OF A MINERAL BASE OIL OF 35 TO 1000 SSU VISCOSITY AT 210* F. CONTAINING 0.1 TO 20% BY WEIGHT OF A COMPOSITION HAVING THE GENERAL 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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |