US2777820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant compositions
Assignee: Ethyl Corp
•
Filing: 1956-01-17
•
Granted: 1957-01-15
•
Expires: 1976-01-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Daniel A Hirschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:26
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
AN IMPROVED CRANKCASE LUBRICANT COMPOSITION FOR SPARK IGNITION INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY OF A CRANKCASE LUBRICATING OIL AND FROM ABOUT 3 TO ABOUT 15 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID OIL OF ACENAPHTHENE.
Claim 2
Dependent Claim
37 words
AN IMPROVED CRANKCASE LUBRICANT COMPOSITION FOR SPARK IGNITION INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY OF A CRANKCASE LUBRICATING OIL AND FROM ABOUT 3 TO ABOUT 15 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID OIL OF ACENAPHTHENE.
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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |