Patent US2902941A successfully refreshed from Google Patents.
US2902941A
Expired / Lapsed
US
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Plastic pump impeller
Assignee: CONTINENTAL PLASTICS CORP
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Filing: 1957-08-02
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Granted: 1959-09-08
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Expires: 1977-08-02
Abstract
No abstract record available.
Inventors
- 👤 Kiba Yoneo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:16
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2227; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43
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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |