Patent US2643615A successfully refreshed from Google Patents.
US2643615A
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Centrifugal pump with center intake
Assignee: Individual
•
Filing: 1948-09-01
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Granted: 1953-06-30
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Expires: 1968-09-01
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Murphy
- 👤 Edward H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:34
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/043; F04D29/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1435028A
Cited
DE504047C
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US2001369A
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US2028360A
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US2033812A
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US2226145A
Cited
US2237027A
Cited
US2205747A
Cited
GB538658A
Cited
US2421529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |