Patent CA691965A successfully refreshed from Google Patents.
US3051237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for varying well pump stroke
Assignee: Jersey Production Research Co
•
Filing: 1961-01-30
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Granted: 1962-08-28
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph R Liles
- 👤 Jr Charles B Corley
- 👤 Samuel E Loy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:59
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/06; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2144; Y10T74/2147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2927478A
Cited
US2877652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |