Patent US2611246A successfully refreshed from Google Patents.
US2611246A
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US
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Pump and motor hydraulic system and electrical control circuits therefor
Assignee: Elwell Parker Electric Co
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Filing: 1950-04-28
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Granted: 1952-09-23
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Expires: 1970-04-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Ackermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:32
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/08; Y; Y10; Y10S; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1616841A
Cited
US1955154A
Cited
US2209565A
Cited
US2219896A
Cited
US2283271A
Cited
US2449639A
Cited
US2382263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |