Patent US2823613A successfully refreshed from Google Patents.
US2823613A
Expired / Lapsed
US
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Centrifugal pump arrangement
Assignee: Individual
•
Filing: 1955-05-17
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Granted: 1958-02-18
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Expires: 1975-05-17
Abstract
No abstract record available.
Inventors
- 👤 Leduc Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:58
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/004; F04D9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189825988A
Cited
US790702A
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FR463338A
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US1680906A
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US2124681A
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US2343486A
Cited
US2581828A
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CH258945A
Cited
US2612844A
Cited
US2674189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |