US3462115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropneumatic valve positioner
Assignee: Monsanto Co
•
Filing: 1965-05-14
•
Granted: 1969-08-19
•
Expires: 1985-05-14
Abstract
No abstract record available.
Inventors
- 👤 George E Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:25
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0658; F16K31/0665
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2588522A
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US2843147A
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US2789543A
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US3015768A
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US3020886A
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US3036598A
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US3307824A
Cited
US3247912A
Cited
US3266379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |