Patent US2168850A successfully refreshed from Google Patents.
US2168850A
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US
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Reciprocating ram pump
Assignee: Individual
•
Filing: 1937-06-02
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Granted: 1939-08-08
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Expires: 1957-06-02
Abstract
No abstract record available.
Inventors
- 👤 Towler John Maurice
- 👤 Towler Frank Hathorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:50
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B9/04; F04B9/045; F04B53/00; F04B53/10; F04B53/102; F04B53/1022; F04B53/14; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/211; Y10T74/2116; Y10T74/2173
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) | 1942-08-07 | 1943-02-06 | 1943-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-07 | 1947-02-06 | 1947-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-07 | 1951-02-06 | 1951-08-08 | $7700.00 | Window Closed / Lapsed |