Patent US2734458A successfully refreshed from Google Patents.
US2734458A
Expired / Lapsed
US
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Pump speed control arrangement
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:03
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218; F04D15/0066; H; H01; H01C; H01C10/00; H01C10/02; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/929; Y10S388/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1633786A
Cited
US1785480A
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US1942241A
Cited
US2147422A
Cited
US2394220A
Cited
US2468791A
Cited
US2482496A
Cited
US2447087A
Cited
US2516386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |