Patent US1851666A successfully refreshed from Google Patents.
US1851666A
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Hydraulic operated pump
Assignee: Individual
•
Filing: 1930-09-24
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Granted: 1932-03-29
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Expires: 1950-09-24
Abstract
No abstract record available.
Inventors
- 👤 Carol L Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:00
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/025; F04B43/026; F04B43/06; F04B43/067; F04B5/00; F04B5/02
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) | 1935-03-29 | 1935-09-28 | 1936-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-29 | 1939-09-28 | 1940-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-29 | 1943-09-28 | 1944-03-29 | $7700.00 | Window Closed / Lapsed |