Patent US2185448A successfully refreshed from Google Patents.
US2185448A
Expired / Lapsed
US
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Hydraulic pump jack
Assignee: Individual
•
Filing: 1938-03-12
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Granted: 1940-01-02
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Expires: 1958-03-12
Abstract
No abstract record available.
Inventors
- 👤 John H Suter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:03
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04
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) | 1943-01-01 | 1943-07-03 | 1944-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-01 | 1947-07-03 | 1948-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-01 | 1951-07-03 | 1952-01-02 | $7700.00 | Window Closed / Lapsed |