Patent US3354413A successfully refreshed from Google Patents.
US3354413A
Expired / Lapsed
US
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Electromechanical filter for low frequencies
Assignee: Kokusai Denki Electric Inc
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Filing: 1962-11-05
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Granted: 1967-11-21
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Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Ko Yasuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48; G; G04; G04C; G04C3/00; G04C3/08; G04C3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN ELECTROMECHANICAL FILTER COMPRISING, A TUNING FORK HAVING A PLURALITY OF ARMS, FOR EACH ARM A PIEZOELECTRIC TRANSDUCER THEREON ADJACENT A ROOT THEREOF, MEANS FOR IMPRESSING AN ELECTRIC SIGNAL ON ONE OF SAID TRANSDUCERS FOR VIBRATING SAID ONE OF SAID ARMS THEREBY TO VIBRATE THE OTHERS OF SAID ARMS, THE OTHERS OF SAID ARMS COMPRISING TWO ARMS, PICK-OFF MEANS COMPRISING THE TRANSDUCERS ON THE OTHER ARMS OF SAID TUNING FORK TO PICK-OFF INVERSE SIG-
Claim 2
Dependent Claim
74 words
AN ELECTROMECHANICAL FILTER COMPRISING, A TUNING FORK HAVING A PLURALITY OF ARMS, FOR EACH ARM A PIEZOELECTRIC TRANSDUCER THEREON ADJACENT A ROOT THEREOF, MEANS FOR IMPRESSING AN ELECTRIC SIGNAL ON ONE OF SAID TRANSDUCERS FOR VIBRATING SAID ONE OF SAID ARMS THEREBY TO VIBRATE THE OTHERS OF SAID ARMS, THE OTHERS OF SAID ARMS COMPRISING TWO ARMS, PICK-OFF MEANS COMPRISING THE TRANSDUCERS ON THE OTHER ARMS OF SAID TUNING FORK TO PICK-OFF INVERSE SIG-
References Cited (Backward Citations)
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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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |