Patent US2381754A successfully refreshed from Google Patents.
US2009137A
Expired / Lapsed
US
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Multistage pump and pumping system
Assignee: Webster Electric Co Inc
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Filing: 1932-04-12
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Granted: 1935-07-23
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Expires: 1952-04-12
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Kieckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/18; F04C11/00; F04C11/001; F23; F23K; F23K5/00; F23K5/02; F23K5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-07-22 | 1939-01-21 | 1939-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-22 | 1943-01-21 | 1943-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-22 | 1947-01-21 | 1947-07-23 | $7700.00 | Window Closed / Lapsed |