US2651998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump
Assignee: Dayton Pump and Manufacturing Co
•
Filing: 1951-06-29
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Granted: 1953-09-15
•
Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 Charles J Bergh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:23
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/445; F04D1/00; F04D1/06; F04D1/063; F04D1/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1997824A
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US2139379A
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US2424285A
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US2344958A
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US2395793A
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US2480435A
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US2477079A
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US2478941A
Cited
US2478706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |