US2300831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically operated pump mechanism
Assignee: Individual
•
Filing: 1939-12-29
•
Granted: 1942-11-03
•
Expires: 1959-12-29
Abstract
No abstract record available.
Inventors
- 👤 John R James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:47
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/0076; F04B1/00; F04B1/02; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B53/00; F04B9/00; F04B9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421; Y10T137/86429
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) | 1945-11-02 | 1946-05-04 | 1946-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-02 | 1950-05-04 | 1950-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-02 | 1954-05-04 | 1954-11-03 | $7700.00 | Window Closed / Lapsed |