US2392423A
Expired / Lapsed
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Hydraulic control system
Assignee: HYDRAULIC CONTROL ENGINEERING
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Filing: 1943-08-21
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Granted: 1946-01-08
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Expires: 1963-08-21
Abstract
No abstract record available.
Inventors
- 👤 William T Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; B; B60; B60T; B60T11/00; B60T11/10; B60T11/103; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/08; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F16; F16K; F16K11/00; F16K11/10; F16K11/20; F15B2211/00; F15B2211/30; F15B2211/31; F15B2211/3105; F15B2211/3116; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/365; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/55; F15B2211/70; F15B2211/78; F15B2211/781
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) | 1949-01-07 | 1949-07-09 | 1950-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-07 | 1953-07-09 | 1954-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-07 | 1957-07-09 | 1958-01-08 | $7700.00 | Window Closed / Lapsed |