Patents by Inventor Franck F. Eyraud

Franck F. Eyraud has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ferroelectric perovskites
    Patent number: 5683613
    Abstract: The invention relates to pulverulent ferroelectric perovskites having piezoelectric properties up to a temperature of approximately 300.degree. C. as well as their manufacturing processes. The processes include a step wherein fluorine ions are inserted into the perovskites at anionic sites and/or oxygen vacancies. The perovskites are used as raw materials for the production of piezoelectric ceramics which find application in a variety of fields, such as electroacoustic transducers, piezoelectric motors, welding and industrial cleaning.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: November 4, 1997
    Assignee: Etat Francais as represented by the Delegue General pour l 'Armement
    Inventors: Lucien Eyraud, Michel M. Boisrayon, Paul A. Eyraud, Franck F. Eyraud, David D. Audigier