Electrostrictive driving device, process for sonic wave projection and polymer materials for use therein
Patent 5229979 Issued on July 20, 1993. Estimated Expiration Date: 
December 13, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 13, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3801839 Multiple layer piezoelectric wavefront modulator Crosslinked polyphosphazenes as piezoelectric materials Patent #: 4933479 InventorsApplicationNo. 804705 filed on 12/13/1991US Classes:367/157, Piezoelectric29/25.35, PIEZOELECTRIC DEVICE MAKING310/311, Piezoelectric elements and devices310/334, Acoustic wave type generator or receiver310/800, PIEZOELECTRIC POLYMERS (E.G., MYLAR, PVDF)367/140, SIGNAL TRANSDUCERS367/163With diaphragmExaminersPrimary: Eldred, J. WoodrowAttorney, Agent or FirmInternational ClassH04B 017/00AbstractThe provided invention is a novel electrostrictive driving device which comprises a sonic wave projector element having alternating electrodes and polymer material film layers. The device provides when subjected to a high bias voltage and a superimposed A.C. voltage, a high Angstroms/Volt response. Also, provided is a process for projecting sonic waves using the electrostrictive driving device of this invention. | |
