US3559162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary directional sonar transducer
Assignee: Sparton Corp
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Filing: 1969-04-14
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Granted: 1971-01-26
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Expires: 1989-04-14
Abstract
Abstract AN UNDERWATER SONAR TRANSDUCER UTILIZING A UNITARY OR HOMOGENEOUS CYLINDRICAL PIEZOELECTRIC CERAMIC ELEMENT HAVING TWO SETS OF ELECTRODES FIXED THERETO AT SEPARATE AXIAL REGIONS OF THE PIEZOELECTRIC CYLINDER ELEMENT. ONE SET OF ELECTRODES PRODUCES ORTHOGONAL DIRECTIONAL BEARING RELATED VOLTAGES, AND THE OTHER SET OF ELECTRODES PRODUCES OMNIDIRECTIONAL BEARING RELATED TO VOLTAGES.
Inventors
- 👤 Ernest A Granfors
- 👤 Don L Loveless
- 👤 Charles F Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:41
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0655
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |