Patent US3023709A successfully refreshed from Google Patents.
US3023709A
Expired / Lapsed
US
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Vanes of an impeller for axial flow propeller pumps
Assignee: Individual
•
Filing: 1958-05-26
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Granted: 1962-03-06
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Kondo Masukichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/181; F04D29/66; F04D29/669
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1596459A
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US1688809A
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US2029813A
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US2225406A
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US2325154A
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US2269287A
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US2327841A
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US2390879A
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US2847941A
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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) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |