US3394914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure responsive sealing butterfly valve
Assignee: Individual
•
Filing: 1965-07-19
•
Granted: 1968-07-30
•
Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Nagasato Takamitsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:00
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/228; F16K1/2285; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23613E
Cited
US3073336A
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GB245650A
Cited
US1826941A
Cited
US1813126A
Cited
US2081842A
Cited
US3080145A
Cited
US3159377A
Cited
US3076631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |