Patent US3397859A successfully refreshed from Google Patents.
US3397859A
Expired / Lapsed
US
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Electromechanical transducer and valve operated thereby
Assignee: Febco Inc
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Filing: 1965-06-14
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Granted: 1968-08-20
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Barnett John Sterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:16
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1853504A
Cited
US2835634A
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US3140852A
Cited
US3164365A
Cited
US3256686A
Cited
US3266235A
Cited
US3263411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |