US2948295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical valve positioner
Assignee: CONVAL CORP
•
Filing: 1955-09-13
•
Granted: 1960-08-09
•
Expires: 1975-09-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:24
CPC Classifications
F; F16; F16K; F16K37/00; F16K37/0025; F16K37/0041; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7761
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1513457A
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FR793622A
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US2207921A
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US2320508A
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US2519043A
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US2743402A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |