Patent US2468520A successfully refreshed from Google Patents.
US2468520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricating compositions
Assignee: Standard Oil Development Co
•
Filing: 1947-08-30
•
Granted: 1949-04-26
•
Expires: 1967-08-30
Abstract
No abstract record available.
Inventors
- 👤 Lorne W Sproule
- 👤 Laurence F King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:09
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2211/00; C10M2211/02; C10M2211/08; C10M2223/00; C10M2223/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |