US2812722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power drive for reciprocating well pumps
Assignee: Individual
•
Filing: 1955-12-06
•
Granted: 1957-11-12
•
Expires: 1975-12-06
Abstract
No abstract record available.
Inventors
- 👤 David C Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:11
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B9/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1751474A
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US2213927A
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US2226461A
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US2382080A
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US2591951A
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US2573753A
Cited
US2573948A
Cited
US2691941A
Cited
US2702510A
Cited
US2727469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |