Patent US5246370A successfully refreshed from Google Patents.
US2883340A
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High viscosity index detergent lubricating oils
Assignee: Union Oil Company of California
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Filing: 1956-02-20
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Granted: 1959-04-21
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 William L Wasley
- 👤 Chester E Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:21
CPC Classifications
C; C10; C10M; C10M143/00; C08; C08F; C08F10/00; C10M2219/00; C10M2219/04; C10M2219/046; C10M2221/00; C10M2221/04; C10M2221/041; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A HIGH V.I., DETERGENT LUBRICATING OIL CONSISTING ESSENTIALLY OF MINERAL LUBRICATING OIL CONTAINING BETWEEN ABOUT 1% AND ABOUT 15% BY WEIGHT OF THE METAL SALT OF A HYDROGEN POLYMER SULFONIC ACID, SAID METAL BEING SELECTED FROM THE CLASS CONSISTING OF THE ALKALI AND ALKALINE EARTH METALS AND SAID HYDROCARBON POLYMER BEING ONE HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 10,000 AND ABOUT 50,000 AND SELECTED FROM THE CLASS CONSISTING OF POLYMERS OF MONOOLEFINS HAVING 3 TO 6 CARBON ATOMS PER MOLECULE AND COPOLYMERS OF SAID MONOOLEFINS WITH MULTIOLEFINS HAVING 4 TO 7 CARBON ATOMS PER MOLECULE IN WHICH THE RATIO OF MULTIOLEFIN TO MONOOLEFIN IS BETWEEN ABOUT 0.005 AND ABOUT 0.1 TO 1
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |