US3439711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequentially power actuated plural valves
Assignee: Thermal Hydraulics Corp
•
Filing: 1966-07-06
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Granted: 1969-04-22
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Expires: 1986-07-06
Abstract
No abstract record available.
Inventors
- 👤 John F Sherwood
- 👤 Marvin Staschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:11
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/1921; F; F16; F16K; F16K39/00; F16K39/02; F16K39/024; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/86984; Y10T137/87016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2259809A
Cited
US2055133A
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US2213488A
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US2265496A
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US2966167A
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US3213887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |