US2938467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centriseal pump
Assignee: ALLEN SHERMAN HOFF PUMP COMPAN
•
Filing: 1956-01-16
•
Granted: 1960-05-31
•
Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 John E Fearon
- 👤 Frederic S Stow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:20
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/086; F04D7/00; F04D7/02; F04D7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB212879A
Cited
GB432743A
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US2075895A
Cited
DE719353C
Cited
US2347751A
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US2423825A
Cited
US2555640A
Cited
GB643247A
Cited
US2571802A
Cited
US2658454A
Cited
US2752858A
Cited
US2806433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |