US3425446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternate,variable timing control for hydraulic devices
Assignee: DARL D MCNOWN
•
Filing: 1967-06-12
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Granted: 1969-02-04
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Expires: 1987-06-12
Abstract
No abstract record available.
Inventors
- 👤 Darl D Mcnown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:44
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/43; G05B19/46; F; F16; F16K; F16K31/00; F16K31/44; F16K31/48; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421; Y10T137/86429; Y10T137/86445; Y10T137/86461
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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |