US2723286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of acidity in synthetic ester lubes with ethylene carbonate
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1951-10-06
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Granted: 1955-11-08
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Expires: 1971-10-06
Abstract
No abstract record available.
Inventors
- 👤 David W Young
- 👤 Delmer L Cottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:28
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M105/42; C10M105/46; C07; C07C; C07C67/00; C07C67/48; C07C67/60; C07C67/62; C10M177/00; C10M2207/00; C10M2207/28; C10M2207/30; C10M2207/301; C10M2207/304; C10M2207/3045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE REDUCTION OF THE RESIDUAL ACIDITY OF A SYNTHETIC LUBRICATING OIL OF THE COMPLEX ESTER TYPE WHICH COMPRISES REACTING THE COMPLEX ESTER WITH ETHYLENE CARBONATE, SAID REACTION OCCURRING AT A TEMPERATURE WITHIN A RANGE OF BETWEEN 100* C. AND 250* C. FOR A PERIOD OF TIME SUFFICIENT TO REDUCE THE RESIDUAL ACIDITY OF THE COMPLEX ESTER TO AN EQUIVALENT OF BELOW ABOUT 0.5 MG KOH/G.
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE REDUCTION OF THE RESIDUAL ACIDITY OF A SYNTHETIC LUBRICATING OIL OF THE COMPLEX ESTER TYPE WHICH COMPRISES REACTING THE COMPLEX ESTER WITH ETHYLENE CARBONATE, SAID REACTION OCCURRING AT A TEMPERATURE WITHIN A RANGE OF BETWEEN 100* C. AND 250* C. FOR A PERIOD OF TIME SUFFICIENT TO REDUCE THE RESIDUAL ACIDITY OF THE COMPLEX ESTER TO AN EQUIVALENT OF BELOW ABOUT 0.5 MG KOH/G.
References Cited (Backward Citations)
US1817898A
Cited
US2537890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |