US2913412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Shell Development Co
•
Filing: 1956-05-21
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Granted: 1959-11-17
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Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Moore
- 👤 Jr Elliott E Ryder
- 👤 Robert C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:36
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/027; C10M2207/04; C10M2207/044; C10M2207/08; C10M2207/10; C10M2207/14; C10M2207/144; C10M2207/146; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/089; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/12; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A LUBRICATING OIL COMPOSITION, BENEFICIAL FOR REDUCING THE OCTANE REQUIREMENT AND FOR KEEPING ENGINES CLEAN WHICH OPERATE ON A KNOCK-INHIBITED FUEL, CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF MINERAL LUBRICATING OIL CONTAINING FORM 0.1% TO 10% OF A C5-22 AKLYL NAPHTHENO DIAROMATIC HYDROCARBON COMPOUND SELECTED FORM THE GROUP CONSISTING OF AN ENRICHED BRIGHT STOCK FRACTION CONTAINING ABOUT 15% TO 35% OF AN ALKYL NAPHTHENONAPHTHALENE, C16-C22 ALKYL ACENAPTHLENE AND C16-C22 ALKYL FLUORENE AND FROM 0.1% TO 5% OF AN ALKALINE EARTH METAL ALKYL PHENATE.
Claim 2
Dependent Claim
83 words
A LUBRICATING OIL COMPOSITION, BENEFICIAL FOR REDUCING THE OCTANE REQUIREMENT AND FOR KEEPING ENGINES CLEAN WHICH OPERATE ON A KNOCK-INHIBITED FUEL, CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF MINERAL LUBRICATING OIL CONTAINING FORM 0.1% TO 10% OF A C5-22 AKLYL NAPHTHENO DIAROMATIC HYDROCARBON COMPOUND SELECTED FORM THE GROUP CONSISTING OF AN ENRICHED BRIGHT STOCK FRACTION CONTAINING ABOUT 15% TO 35% OF AN ALKYL NAPHTHENONAPHTHALENE, C16-C22 ALKYL ACENAPTHLENE AND C16-C22 ALKYL FLUORENE AND FROM 0.1% TO 5% OF AN ALKALINE EARTH METAL ALKYL PHENATE.
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |