Patent US3402671A successfully refreshed from Google Patents.
US3402671A
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Centrifugal pump and sealing means therefor
Assignee: AR Wilfley and Sons Inc
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Filing: 1967-05-17
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Granted: 1968-09-24
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Expires: 1987-05-17
Abstract
No abstract record available.
Inventors
- 👤 George M Wilfley
- 👤 James B Studebaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:53
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/164; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/14; F04D29/146; F16J15/002; F16J15/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1556657A
Cited
US2092351A
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US1976532A
Cited
US2571802A
Cited
US2620207A
Cited
US2660487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |