Patent US3304446A successfully refreshed from Google Patents.
US3304446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostrictive fluid transducer
Assignee: Union Oil Company of California
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Filing: 1963-12-26
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Granted: 1967-02-14
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Martinek
- 👤 Donald L Klass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:43
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/006; H04R17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A TRANSDUCER FOR CONVERTING ELECTRICAL ENERGY TO MECHANICAL ENERGY COMPRISING TWO MEMBERS HAVING OPPOSING, SPACED, ELECTRICALLY CONDUCTIVE, SURFACES ELECTRICALLY INSULATED FROM EACH OTHER, AT LEAST ONE OF SAID MEMBERS BEING A FLEXIBLE DIAPHRAGM, AN ELECTROSTRICTIVE FLUID CONFINED IN THE ENTIRE SPACE BETWEEN SAID SURFACES, SAID FLUID COMPRISING PARTICLES HAVING NON-PIEZOELECTRIC PROPERTIES, AND ELECTRICAL CONDUCTOR MEANS CONNECTED TO EACH OF THE ELECTRICALLY CONDUCTIVE SURFACES, WHEREBY APPLICATION OF A VARYING ELECTRIC POTENTIAL RESULTS IN CHANGE IN VOLUME OF THE ELECTROSTRICTIVE FLUID TO PRODUCE MECHANICAL ENERGY.
Claim 2
Dependent Claim
83 words
A TRANSDUCER FOR CONVERTING ELECTRICAL ENERGY TO MECHANICAL ENERGY COMPRISING TWO MEMBERS HAVING OPPOSING, SPACED, ELECTRICALLY CONDUCTIVE, SURFACES ELECTRICALLY INSULATED FROM EACH OTHER, AT LEAST ONE OF SAID MEMBERS BEING A FLEXIBLE DIAPHRAGM, AN ELECTROSTRICTIVE FLUID CONFINED IN THE ENTIRE SPACE BETWEEN SAID SURFACES, SAID FLUID COMPRISING PARTICLES HAVING NON-PIEZOELECTRIC PROPERTIES, AND ELECTRICAL CONDUCTOR MEANS CONNECTED TO EACH OF THE ELECTRICALLY CONDUCTIVE SURFACES, WHEREBY APPLICATION OF A VARYING ELECTRIC POTENTIAL RESULTS IN CHANGE IN VOLUME OF THE ELECTROSTRICTIVE FLUID TO PRODUCE MECHANICAL ENERGY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |