Patent US2722896A successfully refreshed from Google Patents.
US2722896A
Expired / Lapsed
US
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Pump valve
Assignee: Individual
•
Filing: 1952-10-14
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Granted: 1955-11-08
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Expires: 1972-10-14
Abstract
No abstract record available.
Inventors
- 👤 James L Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:01
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/106; F04B53/1062; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/16; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7891
Claims Analysis
Total Claims: 0
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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 |