Patent US2390620A successfully refreshed from Google Patents.
US2390620A
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US
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Hydraulic driving device
Assignee: Individual
•
Filing: 1944-09-26
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Granted: 1945-12-11
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Expires: 1964-09-26
Abstract
No abstract record available.
Inventors
- 👤 David L Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:38
CPC Classifications
F; F16; F16H; F16H43/00; B; B25; B25B; B25B13/00; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T74/00; Y10T74/19; Y10T74/19149; Y10T74/19158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-12-10 | 1949-06-11 | 1949-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-10 | 1953-06-11 | 1953-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-10 | 1957-06-11 | 1957-12-11 | $7700.00 | Window Closed / Lapsed |