Patent US2993952A successfully refreshed from Google Patents.
Patent US2621601A successfully refreshed from Google Patents.
US2621601A
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US
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Centrifugal pump assembly
Assignee: Individual
•
Filing: 1946-05-15
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Granted: 1952-12-16
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Expires: 1966-05-15
Abstract
No abstract record available.
Inventors
- 👤 Minor W Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:01
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/06; F04D1/063; F04D1/066; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2233; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1157240A
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US1159868A
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US1382665A
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US1803191A
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US1866064A
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US1947658A
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US2380924A
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US2381824A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |