Patent US3408944A successfully refreshed from Google Patents.
US3408944A
Expired / Lapsed
US
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Impeller construction for a centrifugal pump
Assignee: Sta Rite Industries LLC
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Filing: 1966-12-02
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Granted: 1968-11-05
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Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 Robert L Belonger
- 👤 Donald L Seuser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:28
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2227; B; B29; B29C; B29C45/00; B29C45/14; B29C45/14311; B29C45/14598; B29L; B29L2031/00; B29L2031/08; B29L2031/087; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43; F05D2300/50; F05D2300/502; F05D2300/5021; F05D2300/50211; F05D2300/60; F05D2300/603
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |