Patent US2655868A successfully refreshed from Google Patents.
US2655868A
Expired / Lapsed
US
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Bladeless pump impeller
Assignee: Fairbanks Morse and Co
•
Filing: 1947-09-08
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Granted: 1953-10-20
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Expires: 1967-09-08
Abstract
No abstract record available.
Inventors
- 👤 Fred I Lindau
- 👤 Robinson C Glazebrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2238; F04D29/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1074043A
Cited
US1470607A
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US1849127A
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US1754992A
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US1839126A
Cited
DE714289C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |