Patent DE1011539B successfully refreshed from Google Patents.
US2626631A
Expired / Lapsed
US
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Hydraulic control valve
Assignee: Individual
•
Filing: 1951-02-19
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Granted: 1953-01-27
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Expires: 1971-02-19
Abstract
No abstract record available.
Inventors
- 👤 Francis B Hotton
- 👤 Lewis A Medlar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:52
CPC Classifications
A; A01; A01K; A01K39/00; A01K39/02; A01K39/022; F; F16; F16K; F16K21/00; F16K21/04; F16K21/16; F16K21/165; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7355
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1662716A
Cited
US1901456A
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US2146537A
Cited
US2107573A
Cited
US2220294A
Cited
US2254253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |