US3218256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: Castrol Ltd
•
Filing: 1962-09-11
•
Granted: 1965-11-16
•
Expires: 1982-09-11
Abstract
No abstract record available.
Inventors
- 👤 Edwards Eric Descamp
- 👤 Elliott John Scotchford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:49
CPC Classifications
C; C10; C10M; C10M3/00; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/107; C10M2209/108; C10M2209/109; C10M2209/11; C10M2209/111; C10M2209/112; C10M2211/00; C10M2211/02; C10M2211/024; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A SYNTHETIC ORGANIC LUBRICATING OIL, WHICH OIL CONSISTS ESSENTIALLY OF A NEUTRAL SATURATED ORGANIC CARBOXYLIC ACID ESTER BASE, SAID LUBRICATING OIL HAVING DISSOLVED THEREIN THREE ADDITIVES (A), (B) AND (C). ADDITIVE (A) BEING PRESENT IN AN AMOUNT TO PROVIDE A SULPHUR CONTENT OF FROM 0.03 TO 0.20 PERCENT BY WEIGHT ON THE TOTAL WEIGHT OF THE COMPOSITION AND BEING A PHENOTHIAZINE DERIVATIVE HAVING THE FORMULA
Claim 2
Dependent Claim
71 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A SYNTHETIC ORGANIC LUBRICATING OIL, WHICH OIL CONSISTS ESSENTIALLY OF A NEUTRAL SATURATED ORGANIC CARBOXYLIC ACID ESTER BASE, SAID LUBRICATING OIL HAVING DISSOLVED THEREIN THREE ADDITIVES (A), (B) AND (C). ADDITIVE (A) BEING PRESENT IN AN AMOUNT TO PROVIDE A SULPHUR CONTENT OF FROM 0.03 TO 0.20 PERCENT BY WEIGHT ON THE TOTAL WEIGHT OF THE COMPOSITION AND BEING A PHENOTHIAZINE DERIVATIVE HAVING THE FORMULA
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |