US2820766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: CC Wakefield and Co Ltd
•
Filing: 1955-01-24
•
Granted: 1958-01-21
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Elliott John Scotchford
- 👤 Edwards Eric Descamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:58
CPC Classifications
G; G04; G04B; G04B31/00; G04B31/08; C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/11; C10M2209/111; C10M2209/112; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PROPORTION OF AT LEAST ONE ESTER OF THE GENERAL FORMULA
Claim 2
Dependent Claim
16 words
A LUBRICATING COMPOSITION COMPRISING A MAJOR PROPORTION OF AT LEAST ONE ESTER OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2139766A
Cited
GB455235A
Cited
US2396839A
Cited
US2499984A
Cited
US2639266A
Cited
US2760934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |