Patent US2722850A successfully refreshed from Google Patents.
US2722850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power reducer for pumping wells
Assignee: Individual
•
Filing: 1951-08-20
•
Granted: 1955-11-08
•
Expires: 1971-08-20
Abstract
No abstract record available.
Inventors
- 👤 Hilry M Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:00
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/28; F04; F04B; F04B47/00; F04B47/14; F16H; F16H33/00; F16H2706/00; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2154; Y10T74/2156
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |