Patent US2500400A successfully refreshed from Google Patents.
US2500400A
Expired / Lapsed
US
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Axial flow pump
Assignee: Individual
•
Filing: 1946-10-25
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Granted: 1950-03-14
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Expires: 1966-10-25
Abstract
No abstract record available.
Inventors
- 👤 Byron A Cogswell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:23
CPC Classifications
F; F04; F04D; F04D3/00; F04D3/02; F04D13/00; F04D13/02; F04D13/04; F04D13/043; F04D13/06; F04D13/0646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE32057C
Cited
GB190400229A
Cited
GB190900214A
Cited
US1405959A
Cited
US1534451A
Cited
GB210273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |