Patent US3421318A successfully refreshed from Google Patents.
US3421318A
Expired / Lapsed
US
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Multiple digital signal transducer
Assignee: Chandler Evans Inc
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Filing: 1966-05-16
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Granted: 1969-01-14
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Expires: 1986-05-16
Abstract
No abstract record available.
Inventors
- 👤 Ronald E Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:51
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2145117A
Cited
US2458325A
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CH265630A
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US2790090A
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US3011110A
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US2883975A
Cited
US3038449A
Cited
US3348559A
Cited
US3266378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |