US3374367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic transducers
Assignee: Individual
•
Filing: 1966-01-21
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Granted: 1968-03-19
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Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 John V Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:25
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2437; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; G01B; G01B17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AN ELECTROACOUSTIC TRANSDUCER COMPRISING: (A) A PIEZOELECTRIC BODY HAVING A FIRST AND A SECOND MAJOR SURFACE; (B) A FIRST AND A SECOND ELECTRODE ADJACENT TO EACH MAJOR SURFACE, AND, (C) AT LEAST TWO VOLUMETRIC PORTIONS OF SAID BODY BETWEEN SAID ELECTRODES BEING POLARIZED SUCH THAT UPON THE APPLICATION OF AN ELECTRIC FIELD THERETO, A FIRST AND A SECOND POTENTIAL ENERGY QUANTITY IS STORED IN SAID PORTIONS OF OPPOSITE KIND AND UPON TERMINATION OF SAID ELECTRIC FIELD THE POTENTIAL ENERGY IS CHANGED TO A FIRST AND A SECOND KIND OF KINETIC ENERGY THAT IS SUBSTANTIALLY MUTUALLY CANCELLABLE, THUS CREATING A SELF-DAMPING TRANSDUCER.
Claim 2
Dependent Claim
101 words
AN ELECTROACOUSTIC TRANSDUCER COMPRISING: (A) A PIEZOELECTRIC BODY HAVING A FIRST AND A SECOND MAJOR SURFACE; (B) A FIRST AND A SECOND ELECTRODE ADJACENT TO EACH MAJOR SURFACE, AND, (C) AT LEAST TWO VOLUMETRIC PORTIONS OF SAID BODY BETWEEN SAID ELECTRODES BEING POLARIZED SUCH THAT UPON THE APPLICATION OF AN ELECTRIC FIELD THERETO, A FIRST AND A SECOND POTENTIAL ENERGY QUANTITY IS STORED IN SAID PORTIONS OF OPPOSITE KIND AND UPON TERMINATION OF SAID ELECTRIC FIELD THE POTENTIAL ENERGY IS CHANGED TO A FIRST AND A SECOND KIND OF KINETIC ENERGY THAT IS SUBSTANTIALLY MUTUALLY CANCELLABLE, THUS CREATING A SELF-DAMPING TRANSDUCER.
References Cited (Backward Citations)
USRE23813E
Cited
US2515446A
Cited
US2967957A
Cited
US3115588A
Cited
US3004176A
Cited
US3343105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |