Patent US2898299A successfully refreshed from Google Patents.
US2898299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester-containing lubricant compositions
Assignee: California Research LLC
•
Filing: 1957-05-31
•
Granted: 1959-08-04
•
Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 Lowe Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:24
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/025; C10M2207/026; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/287; C10M2207/289; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/068; C10M2215/14; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2219/10; C10M2219/104; C10M2219/108; C10M2221/00; C10M2221/04; C10M2221/041; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2040/135; C10N2040/14; C10N2040/16; C10N2040/17; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A LUBRICATING OIL COMPOSITION OF RELATIVELY LOW CORROSIVITY TO SENSITIVE BEARING METALS, COMPRISING A MAJOR PROPORTIONS OF A LUBRICATING OIL CONTAINING FROM 5 TO 10% BY WEIGHT OF AMONESTER OF A POLYHYDROXY ALIPHATIC ALCOHOL HAVING FOUR TO SIX HYDROXYL GROUPS, THE ACID RADICAL IN SAID MONOESTER BEING THAT OF AN ALIPHATIC CARBOXYLIC ACID WITH AN OIL-SOLUBILIZING CHAIN OF AT LEAST 8 CARBON ATOMS WHICH CONTAINS A SINGLE OLEFINIC CARBON-TO-CARBON DOUBLE BOND, TOGETHER WITH ABOUT 1 1/2% TO ABOUT 3% OF AN OIL-SOLUBLE TERPENE-P2S5 REACTION PRODUCT AND A SMALL AMOUNT, GREATER THAN 0.03% AND UP TO 1.5% WITHIN THE LIMITS OF SOLUBILITY, OF AN UNSUBSTITUTED VICINAL DIHYDROXY ARYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIHYDROXY BENZENES AND DIHYDROXY ANTHRAQUINONES.
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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |