Patent US2317751A successfully refreshed from Google Patents.
US2317751A
Expired / Lapsed
US
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Lubricating oil
Assignee: Standard Oil Development Co
•
Filing: 1941-09-26
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Granted: 1943-04-27
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Expires: 1961-09-26
Abstract
No abstract record available.
Inventors
- 👤 Per K Frolich
- 👤 Anthony H Gleason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045; C10M2221/00; C10M2221/02; C10M2225/00; C10M2225/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-04-26 | 1946-10-26 | 1947-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-04-26 | 1950-10-26 | 1951-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-04-26 | 1954-10-26 | 1955-04-27 | $7700.00 | Window Closed / Lapsed |