Patent US1459121A successfully refreshed from Google Patents.
Patent US2091287A successfully refreshed from Google Patents.
US2091287A
Expired / Lapsed
US
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Pumping power
Assignee: Individual
•
Filing: 1934-09-04
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Granted: 1937-08-31
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Expires: 1954-09-04
Abstract
No abstract record available.
Inventors
- 👤 Roy E Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:50
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18416; Y10T74/18424
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) | 1940-08-30 | 1941-03-01 | 1941-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-30 | 1945-03-01 | 1945-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-30 | 1949-03-01 | 1949-08-31 | $7700.00 | Window Closed / Lapsed |