Patent US2620307A successfully refreshed from Google Patents.
US2620307A
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US
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Lubricating oil
Assignee: California Research LLC
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Filing: 1950-12-16
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Granted: 1952-12-02
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Expires: 1970-12-16
Abstract
No abstract record available.
Inventors
- 👤 William T Stewart
- 👤 Goldschmidt Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:00
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/04; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/108; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/20; C10M2215/202; C10M2219/00; C10M2219/08; C10M2219/082; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A BLEND OF HYDROCARBON OIL AND POLYALKYLENE GLYCOL POLYMERIC MATERIAL OF LUBRICATING OIL VISCOSITY IN AN AMOUNT, BY VOLUME, OF ABOUT ONE-FOURTH TO ABOUT FOUR-FOLD THE AMOUNT OF SAID HYDROCARBON OIL, AND A MINOR AMOUNT, SUFFICIENT SUBSTANTIALLY TO LOWER THE MISCIBILITY TEMPERATURE OF SAID BLEND, OF AN ETHER HAVING AT LEAST SIX ALIPHATIC CARBON ATOMS IN THE MOLECULE, SAID ETHER BEING FREE OF POLAR SUBSTITUENTS, AND BEING SOLUBLE IN SAID BLEND AT THE MISCIBILITY TEMPERATURE OF SAID BLEND.
Claim 2
Dependent Claim
86 words
LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A BLEND OF HYDROCARBON OIL AND POLYALKYLENE GLYCOL POLYMERIC MATERIAL OF LUBRICATING OIL VISCOSITY IN AN AMOUNT, BY VOLUME, OF ABOUT ONE-FOURTH TO ABOUT FOUR-FOLD THE AMOUNT OF SAID HYDROCARBON OIL, AND A MINOR AMOUNT, SUFFICIENT SUBSTANTIALLY TO LOWER THE MISCIBILITY TEMPERATURE OF SAID BLEND, OF AN ETHER HAVING AT LEAST SIX ALIPHATIC CARBON ATOMS IN THE MOLECULE, SAID ETHER BEING FREE OF POLAR SUBSTITUENTS, AND BEING SOLUBLE IN SAID BLEND AT THE MISCIBILITY TEMPERATURE OF SAID BLEND.
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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |