Patent US2695273A successfully refreshed from Google Patents.
US2695273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Wyeth Holdings LLC
•
Filing: 1952-04-08
•
Granted: 1954-11-23
•
Expires: 1972-04-08
Abstract
No abstract record available.
Inventors
- 👤 Edwin O Hook
- 👤 Jr William D Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:55
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/027; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A HYDROCARBON LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A HYDROCARBON LUBRICATING OIL, FROM ABOUT 0.01% TO ABOUT 3% BY WEIGHT OF 2,2''-METHYLENE BIS(4-METHYL-6-TERTIARY BUTYL PHENOL), AND A BASIC PETROLEUM SULFONATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METALS AND HEAVY METALS IN AN AMOUNT SUFFICIENT TO REDUCE THE LACQUER-FORMING PROPENSITIES OF THE HYDROCARBON LUBRICATING OIL COMPOSITION.
Claim 2
Dependent Claim
62 words
A HYDROCARBON LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A HYDROCARBON LUBRICATING OIL, FROM ABOUT 0.01% TO ABOUT 3% BY WEIGHT OF 2,2''-METHYLENE BIS(4-METHYL-6-TERTIARY BUTYL PHENOL), AND A BASIC PETROLEUM SULFONATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METALS AND HEAVY METALS IN AN AMOUNT SUFFICIENT TO REDUCE THE LACQUER-FORMING PROPENSITIES OF THE HYDROCARBON LUBRICATING OIL COMPOSITION.
References Cited (Backward Citations)
US2570402A
Cited
US2585520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |