Patents by Inventor Gerald P. Espinosa

Gerald P. Espinosa 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).

  • Piezoelectric material
    Patent number: 4059537
    Abstract: A piezoelectric material and a method of producing a piezoelectric material which has a low temperature coefficient of resonant frequency, a low hysteresis, a high mechanical Q, and is suitable for fabricating into mechanical filters. The material is a compound of the general formula Pb(Zr,Ti)O.sub.3 containing Bi substituting for 2 to 15 atomic percent of the Pb and further containing Mn, Zn, and Ni substituting for up to 4 atomic percent of the Zr and Ti.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: November 22, 1977
    Assignee: Rockwell International Corporation
    Inventor: Gerald P. Espinosa