Patent US2432735A successfully refreshed from Google Patents.
US2432735A
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Hydraulic pumping unit
Assignee: Individual
•
Filing: 1945-09-04
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Granted: 1947-12-16
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Expires: 1965-09-04
Abstract
No abstract record available.
Inventors
- 👤 Roy P Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:27
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04; Y; Y10; Y10S; Y10S417/00; Y10S417/904; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18992; Y10T74/21; Y10T74/2142; Y10T74/2154; Y10T74/2156
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR401884A
Cited
US1986012A
Cited
US2175588A
Cited
US2141703A
Cited
US2272579A
Cited
US2351398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |