US3472281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo valve capable of effecting quick feed operation
Assignee: Tokyo Seimitsu Sokki KK
•
Filing: 1966-12-15
•
Granted: 1969-10-14
•
Expires: 1986-12-15
Abstract
No abstract record available.
Inventors
- 👤 Jiro Chiba
- 👤 Ikuo Takahashi
- 👤 Yasuhiro Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:37
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US423105A
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US1307821A
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FR401937A
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US2209418A
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US2391531A
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US2526361A
Cited
US2919681A
Cited
DE1108630B
Cited
US3047018A
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US3160174A
Cited
US3152610A
Cited
US3354912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |