US2245772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant
Assignee: Sinclair Refining Co
•
Filing: 1939-09-21
•
Granted: 1941-06-17
•
Expires: 1959-09-21
Abstract
No abstract record available.
Inventors
- 👤 Nelson J Gothard
- 👤 Jr George Entwistle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:08
CPC Classifications
C; C10; C10M; C10M5/00; C10M2203/00; C10M2203/10; C10M2203/108; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/10
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) | 1944-06-16 | 1944-12-16 | 1945-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-16 | 1948-12-16 | 1949-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-16 | 1952-12-16 | 1953-06-17 | $7700.00 | Window Closed / Lapsed |