Patent US2639673A successfully refreshed from Google Patents.
US2639673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump or motor
Assignee: Electro Hydraulics Ltd
•
Filing: 1948-02-24
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Granted: 1953-05-26
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Expires: 1968-02-24
Abstract
No abstract record available.
Inventors
- 👤 Hadekel Ruben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:45
CPC Classifications
F; F01; F01B; F01B1/00; F01B1/06; F01B1/0641; F01B1/0655
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1239059A
Cited
US1212655A
Cited
GB168488A
Cited
US2074068A
Cited
US2289866A
Cited
US2327787A
Cited
US2439668A
Cited
US2431175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |