US3019188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions containing esters of polycarboxylic aromatic acids
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1958-01-02
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Granted: 1962-01-30
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Expires: 1978-01-02
Abstract
No abstract record available.
Inventors
- 👤 William J Craven
- 👤 Stephen J Metro
- 👤 Alfred H Matuszak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:04
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/30; C10M2207/32; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A LUBRICATING OIL COMPOSITION SUITABLE FOR LUBRICATION OF AIRCRAFT ENGINES COMPRISING A MAJOR AMOUNT OF A SYNTHETIC ALIPHATIC ESTER LUBRICATING OIL AND ABOUT 0.25 TO 10% BY WEIGHT OF A PARTIAL ESTER SELECTED FROM THE GROUP CONSISTING OF MONOALKYL PYROMELLITATE AND DIALKYL PYROMELLITATE, WHEREIN SAID ALKYL GROUPS ARE ALKYL GROUPS OF C3 TO C20 ALCOHOLS.
Claim 2
Dependent Claim
55 words
A LUBRICATING OIL COMPOSITION SUITABLE FOR LUBRICATION OF AIRCRAFT ENGINES COMPRISING A MAJOR AMOUNT OF A SYNTHETIC ALIPHATIC ESTER LUBRICATING OIL AND ABOUT 0.25 TO 10% BY WEIGHT OF A PARTIAL ESTER SELECTED FROM THE GROUP CONSISTING OF MONOALKYL PYROMELLITATE AND DIALKYL PYROMELLITATE, WHEREIN SAID ALKYL GROUPS ARE ALKYL GROUPS OF C3 TO C20 ALCOHOLS.
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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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |