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US2902940A
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Self-priming pumping system
Assignee: Guy F Atkinson Co
•
Filing: 1953-05-12
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Granted: 1959-09-08
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Expires: 1973-05-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Meyer
- 👤 Arrol G Roork
- 👤 Eldon R Deardorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:53
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/007; F04D1/00; F04D1/06; F04D1/063; F04D1/066; Y; Y10; Y10S; Y10S415/00; Y10S415/901; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL51528C
Cited
US1207546A
Cited
US1866064A
Cited
GB375495A
Cited
GB490907A
Cited
FR875924A
Cited
GB558841A
Cited
US2360401A
Cited
GB589095A
Cited
US2510190A
Cited
US2757681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |