US2674577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane engine oil containing combination of magnesium and zinc salts of alkyl hydroxy aromatic compounds
Assignee: Texaco Inc
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Filing: 1952-05-07
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Granted: 1954-04-06
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Expires: 1972-05-07
Abstract
No abstract record available.
Inventors
- 👤 Frederic C Mccoy
- 👤 Bill L Benge
- 👤 Edwin C Knowles
- 👤 Charles C Towne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:53
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2203/102; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/027; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
AN AIRPLANE ENGINE OIL CONSISTING ESSENTIALLY OF A REFINED MINERAL LUBRICATING OIL HAVING AN SUS VISCOSITY AT 210* F. IN EXCESS OF 80, CONTAINING THE COMBINATION OF 0.5-2.0% BY WEIGHT OF THE MAGNESIUM SALT AND 0.25-1.5% OF THE ZINC SALT OF A NUCLEARLY ALKYLATED HYDROGEN AROMATIC COMPOUND CONSISTING OF CARBON, HYDROGEN AND OXYGEN AND HAVING A HYDROXYL GROUP ATTACHED TO THE RING SAID COMPOUND CONTAINING AT LEAST ONE AROMATIC NUCLEUS HAVING ALKYL SUBSTITUENTS ATTACHED TO THE NUCLEUS HAVING A TOTAL OF AT LEAST 15 CARBON ATOMS, THE CONJOINT ACTION OF SAID MAGNESIUM AND ZINC SALT BEING SUCH AS TO MAINTAIN ENGINE CALEANLINESS WHILE AT THE SAME TIME PREVENTING ANY SUBSTANTIAL INCREASE OF OBJECTIONABLE COMBUSTION CHAMBER DEPOSITS OVER THAT OCCURRING WITH THE LUBRICATING OIL ALONE, WHEREBY PREIGNITION AND LOSS OF POWER OF THE ENGINE ARE AVOIDED.
Claim 2
Dependent Claim
135 words
AN AIRPLANE ENGINE OIL CONSISTING ESSENTIALLY OF A REFINED MINERAL LUBRICATING OIL HAVING AN SUS VISCOSITY AT 210* F. IN EXCESS OF 80, CONTAINING THE COMBINATION OF 0.5-2.0% BY WEIGHT OF THE MAGNESIUM SALT AND 0.25-1.5% OF THE ZINC SALT OF A NUCLEARLY ALKYLATED HYDROGEN AROMATIC COMPOUND CONSISTING OF CARBON, HYDROGEN AND OXYGEN AND HAVING A HYDROXYL GROUP ATTACHED TO THE RING SAID COMPOUND CONTAINING AT LEAST ONE AROMATIC NUCLEUS HAVING ALKYL SUBSTITUENTS ATTACHED TO THE NUCLEUS HAVING A TOTAL OF AT LEAST 15 CARBON ATOMS, THE CONJOINT ACTION OF SAID MAGNESIUM AND ZINC SALT BEING SUCH AS TO MAINTAIN ENGINE CALEANLINESS WHILE AT THE SAME TIME PREVENTING ANY SUBSTANTIAL INCREASE OF OBJECTIONABLE COMBUSTION CHAMBER DEPOSITS OVER THAT OCCURRING WITH THE LUBRICATING OIL ALONE, WHEREBY PREIGNITION AND LOSS OF POWER OF THE ENGINE ARE AVOIDED.
References Cited (Backward Citations)
US2289795A
Cited
US2420893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |