US2073841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme pressure lubricating compositions
Assignee: Standard Oil Co
•
Filing: 1934-12-08
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Granted: 1937-03-16
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Expires: 1954-12-08
Abstract
No abstract record available.
Inventors
- 👤 Robert L Humphreys
- 👤 Bruce B Farrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/40; C10M2207/404; C10M2219/00; C10M2219/06; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/20; C10N2040/22; C10N2070/00; C10N2070/02
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) | 1940-03-15 | 1940-09-14 | 1941-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-15 | 1944-09-14 | 1945-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-15 | 1948-09-14 | 1949-03-16 | $7700.00 | Window Closed / Lapsed |