US2715612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition containing phosphorus sulfide hydrocarbon reaction product
Assignee: Sinclair Refining Co
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Filing: 1951-04-25
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Granted: 1955-08-16
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Expires: 1971-04-25
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Beare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:23
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/287; C10M2207/288; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2211/00; C10M2211/02; C10M2211/024; C10M2211/06; C10M2211/08; C10M2219/00; C10M2219/02; C10M2219/024; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A STEAM-TREATED, CLEAR, OIL COMPATIBLE, UNEUTRALIZED REACTION PRODUCT OF A MINERAL OIL BRIGHT STOCK AND ABOUT 7 TO 17 PER CENT PHOSPHORUS PENTASULFIDE AT ABOUT 400* TO 500* F., FROM WHICH INSOLUBLES HAVE BEEN SEPARATED AT A TEMPERATURE OF ABOUT 150*-250* F. PRIOR TO STEAM-TREATMENT.
Claim 2
Dependent Claim
45 words
A STEAM-TREATED, CLEAR, OIL COMPATIBLE, UNEUTRALIZED REACTION PRODUCT OF A MINERAL OIL BRIGHT STOCK AND ABOUT 7 TO 17 PER CENT PHOSPHORUS PENTASULFIDE AT ABOUT 400* TO 500* F., FROM WHICH INSOLUBLES HAVE BEEN SEPARATED AT A TEMPERATURE OF ABOUT 150*-250* F. PRIOR TO STEAM-TREATMENT.
Claim 3
Dependent Claim
64 words
A LUBRICATING OIL COMPOSITION WHICH CONSISTS ESSENTIALLY OF A MINERAL OIL BASE AND SUFFICIENT TO IMPART EXTREME PRESSURE CHARACTERISTICS OF A STEAM-TREATED, CLEAR, OIL COMPATIBLE, UNNEUTRALIZED REACTION PRODUCT OF A MINERAL OIL BRIGHT STOCK AND ABOUT 7 TO 17 PERCENT PHOSPHORUS PENTASULFIDE AT ABOUT 400* TO 500* F., FROM WHICH INSOLUBLES HAVE BEEN SEPARATED AT A TEMPERATURE OF ABOUT 150*-250* F. PRIOR TO STEAM-TREATMENT.
Claim 4
Dependent Claim
64 words
A LUBRICATING OIL COMPOSITION WHICH CONSISTS ESSENTIALLY OF A MINERAL OIL BASE AND SUFFICIENT TO IMPART EXTREME PRESSURE CHARACTERISTICS OF A STEAM-TREATED, CLEAR, OIL COMPATIBLE, UNNEUTRALIZED REACTION PRODUCT OF A MINERAL OIL BRIGHT STOCK AND ABOUT 7 TO 17 PERCENT PHOSPHORUS PENTASULFIDE AT ABOUT 400* TO 500* F., FROM WHICH INSOLUBLES HAVE BEEN SEPARATED AT A TEMPERATURE OF ABOUT 150*-250* F. PRIOR TO STEAM-TREATMENT.
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) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |