US2691000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oils
Assignee: CC Wakefield and Co Ltd
•
Filing: 1952-04-15
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Granted: 1954-10-05
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Expires: 1972-04-15
Abstract
No abstract record available.
Inventors
- 👤 Elliott John Scotchford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:39
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/28; C10M2207/283; C10M2207/287; C10M2207/289; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2211/08; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/064; C10M2219/066; C10M2219/08; C10M2219/082; C10M2219/085; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A LUBRICATING COMPOSITION COMPRISING A MINERAL OIL CONTAINING A SMALL AMOUNT SUFFICIENT TO INCREASE THE LOAD-CARRYING CAPACITY OF THE OIL OF AN ESTER OF ACETIC ACID SUBSTITUTED IN THE ALPHA POSITION BY AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF SULPHUR AND SELEMIUM, SAID ESTER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
49 words
A LUBRICATING COMPOSITION COMPRISING A MINERAL OIL CONTAINING A SMALL AMOUNT SUFFICIENT TO INCREASE THE LOAD-CARRYING CAPACITY OF THE OIL OF AN ESTER OF ACETIC ACID SUBSTITUTED IN THE ALPHA POSITION BY AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF SULPHUR AND SELEMIUM, SAID ESTER HAVING THE GENERAL 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) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |