US2929786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricating oil composition
Assignee: Sinclair Refining Co
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Filing: 1956-05-18
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Granted: 1960-03-22
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Expires: 1976-05-18
Abstract
No abstract record available.
Inventors
- 👤 David W Young
- 👤 Robert L May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:09
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/026; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/30; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/102; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/109; C10M2209/11; C10M2209/112; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10M2221/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A SYNTHETIC LUBRICATING OIL COMPOSITION HAVING A MAXIMUM VISCOSITY AT -40*F. OF ABOUT 13,000 CENTISTOKES AND A MINIMUM VISCOSITY OF ABOUT 7.5 CENTISTOKES AT 210*F. AND CONSISTING ESSENTIALLY OF AN OIL DIESTER BASE HAVING A VISCOSITY OF ABOUT 35 TO 250 SUS AT 210*F., SAID DIESTER BEING OF AN ALIPHATIC DIBASIC ACID OF UP TO ABOUT 12 CARBON ATOMS AND AN ALIPHATIC ALCOHOL OF UP TO ABOUT 12 CARBON ATOMS, AND ABOUT 20 TO 50 WEIGHT PERCENT OF THE POLYESTER PRODUCED BY REACTING IN THE MOLAR RATIO OF ABOUT 1:1 A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC DIBASIC ACIDS OF UP TO ABOUT 12 CARBON ATOMS AND THE LOWER ALIPHATIC ESTERS THEREOF CONPOLYESTER UP TO ABOUT 3 CARBON ATOMS IN THE ESTER GROUP POLYESTER HAVING A KINEMATIC VISCOSITY OF ABOUT 40 TO 125 CENTISTOKES AT 210*F.
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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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |