Patent US2641228A successfully refreshed from Google Patents.
US2641228A
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US
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Control valve mechanism for hydraulic motors
Assignee: Denison Engineering Co
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Filing: 1950-05-26
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Granted: 1953-06-09
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Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Cecil E Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:02
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/161; F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/046; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/30565; F15B2211/3058; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/325; F15B2211/35; F15B2211/353; F15B2211/40; F15B2211/45; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/75; F15B2211/77; F15B2211/7716; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86879; Y10T137/87265; Y10T137/87322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2169470A
Cited
US2335809A
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US2376519A
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US2491355A
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US2448557A
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US2491393A
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US2541958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |