US2420155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism for hydraulic transmissions
Assignee: Hydraulic Development Corp Inc
•
Filing: 1941-05-31
•
Granted: 1947-05-06
•
Expires: 1961-05-31
Abstract
No abstract record available.
Inventors
- 👤 Warren R Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/472
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1244878A
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US1172412A
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FR517652A
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DE420976C
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US1679544A
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US1914090A
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US1974138A
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US2056896A
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FR788035A
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US2161439A
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US2211402A
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US2226481A
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US2255782A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |