Patent US2672822A successfully refreshed from Google Patents.
US2672822A
Expired / Lapsed
US
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Self-priming centrifugal pump
Assignee: Gorman Rupp Industries Inc
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Filing: 1950-08-16
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Granted: 1954-03-23
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Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Edward M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:26
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1824465A
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US2100365A
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US2217211A
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US2291138A
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US2332875A
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US2461865A
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US2444100A
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US2463251A
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US2581828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |