Patent US2566398A successfully refreshed from Google Patents.
US2566398A
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US
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Lubricants and lubricant additives
Assignee: Standard Oil Co
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Filing: 1947-06-07
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Granted: 1951-09-04
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Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 John D Bartleson
- 👤 Herman P Lankelma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:23
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/04; C10M2207/28; C10M2207/32; C10M2223/00; C10M2223/10; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A LUBRICANT COMPRISING A MINERAL LUBRICATING OIL AND AN AMOUNT SUFFICIENT TO INHIBIT THE OXIDATIVE DETERIORATION IN USE OF THE OIL OF AN OIL-DISPERSIBLE PRODUCT OF THE REACTION AT 350* F. FOR EIGHT HOURS OF 1.15 MOLES ETHYL ALCOHOL TO EACH MOLE OF A REACTION PRODUCT OF 1 MOLE OF PHOSPHORUS PENTASULFIDE AND 1.5 MOLES OF "REDUCED MOTOR POLYMER" REACTED TOGETHER AT 350* F. FOR EIGHT HOURS TO PRODUCE AN OIL-DISPERSIBLE MATERIAL SUITABLE FOR IMPROVING THE CHARACTERISTICS OF A MINERAL LUBRICATING OIL.
References Cited (Backward Citations)
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US2316082A
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US2365938A
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US2373094A
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US2415837A
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US2411153A
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US2461961A
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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) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |