US2250265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant
Assignee: National Oil Products Co
•
Filing: 1938-07-27
•
Granted: 1941-07-22
•
Expires: 1958-07-27
Abstract
No abstract record available.
Inventors
- 👤 Kapp Roland
- 👤 Karl T Steik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:23
CPC Classifications
G; G04; G04B; G04B31/00; G04B31/08; C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10N; C10N2040/00; C10N2040/06
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) | 1944-07-21 | 1945-01-20 | 1945-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-21 | 1949-01-20 | 1949-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-21 | 1953-01-20 | 1953-07-22 | $7700.00 | Window Closed / Lapsed |