Patent US2642804A successfully refreshed from Google Patents.
US2642804A
Expired / Lapsed
US
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Hydraulic power unit
Assignee: Dowty Equipment Ltd
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Filing: 1951-03-27
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Granted: 1953-06-23
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Expires: 1971-03-27
Abstract
No abstract record available.
Inventors
- 👤 Eric H Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/007; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/103; F04B2205/00; F04B2205/15; F04B2205/151; F04B2205/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |