US2956954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic ester lubricants
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1956-07-06
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Granted: 1960-10-18
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Expires: 1976-07-06
Abstract
No abstract record available.
Inventors
- 👤 Michael F Hoare
- 👤 Benjamin T Fowler
- 👤 Hans G Krischai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/11; C10M2209/111; C10M2209/112; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10M2221/00; C10M2221/04; C10M2221/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN IMPROVED SYNTHETIC ESTER LUBRICANT, HAVING A KINEMATIC VISCOSITY OF 210*F. OF MORE THAN 6.5 CS. AND LESS THAN 150 SSU AT 210*F., AND CONSISTING ESSENTIALLY OF A MIXTURE OF A COMPLEX ESTER AND DIESTER PREPARED BY COMBINING MORE THAN TWO MOLES EACH OF A DICARBOXYLIC ACID AND AN ALIPHATIC MONOHYDRIC ALCOHOL PER MOL OF POLYGLYCOL, SAID COMPLEX ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
62 words
AN IMPROVED SYNTHETIC ESTER LUBRICANT, HAVING A KINEMATIC VISCOSITY OF 210*F. OF MORE THAN 6.5 CS. AND LESS THAN 150 SSU AT 210*F., AND CONSISTING ESSENTIALLY OF A MIXTURE OF A COMPLEX ESTER AND DIESTER PREPARED BY COMBINING MORE THAN TWO MOLES EACH OF A DICARBOXYLIC ACID AND AN ALIPHATIC MONOHYDRIC ALCOHOL PER MOL OF POLYGLYCOL, SAID COMPLEX ESTER HAVING THE FORMULA
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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |