Patent US5434933A successfully refreshed from Google Patents.
Patent US2463080A successfully refreshed from Google Patents.
US2463080A
Expired / Lapsed
US
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Interengaging impeller fluid pump
Assignee: Schwitzer Cummins Co
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Filing: 1945-02-17
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Granted: 1949-03-01
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Expires: 1965-02-17
Abstract
No abstract record available.
Inventors
- 👤 Kurt A Beier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:53
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/08; F04C18/12; F04C18/14; F04C18/16
Claims Analysis
Total Claims: 0
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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) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |