US3408901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordinated hydraulic motor control system and pressure coordinating valve therefor
Assignee: Hawk Bilt Manufacturing Corp
•
Filing: 1967-12-18
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Granted: 1968-11-05
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Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 Harold G Inhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:09
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/087; F; F15; F15B; F15B11/00; F15B11/16; F15B11/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US601664A
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US1959909A
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US2622372A
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US2745253A
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US2977980A
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US3237788A
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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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |