US2152802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping mechanism
Assignee: Individual
•
Filing: 1937-07-02
•
Granted: 1939-04-04
•
Expires: 1957-07-02
Abstract
No abstract record available.
Inventors
- 👤 Ford W Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:19
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/06; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F04B43/00; F04B43/08; F04B43/10; F04B43/113; F04B43/1136
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) | 1942-04-03 | 1942-10-03 | 1943-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-03 | 1946-10-03 | 1947-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-03 | 1950-10-03 | 1951-04-04 | $7700.00 | Window Closed / Lapsed |