Patent US1931938A successfully refreshed from Google Patents.
US1931938A
Expired / Lapsed
US
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Valve for well pump plungers
Assignee: H R GILES
•
Filing: 1931-04-28
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Granted: 1933-10-24
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Expires: 1951-04-28
Abstract
No abstract record available.
Inventors
- 👤 John W Pippin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:17
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-10-23 | 1937-04-24 | 1937-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-23 | 1941-04-24 | 1941-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-23 | 1945-04-24 | 1945-10-24 | $7700.00 | Window Closed / Lapsed |