Patents by Inventor Basil E. Walker

Basil E. Walker 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).

  • Method for increasing the strength and density of lead titanate ceramic bodies
    Patent number: 4131444
    Abstract: Strengthened and densified ceramic bodies are produced by hot pressing lead itanate powder into a lead titanate ceramic at a pressure from 1000 to 5000 psi and at a temperature from 700 to 1100.degree. C if the atmosphere is reducing or from 700 to 1200.degree. C if the atmosphere is oxidizing and by annealing the lead titanate ceramic at a temperature from 600 to 1100.degree. C in an oxidizing atmosphere for at least four hours.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: December 26, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Basil E. Walker, Robert C. Pohanka, Paul L. Smith, Roy W. Rice
  • Method for strengthening PZT transducers
    Patent number: 4124671
    Abstract: A method for strengthening lead zirconate-lead titanate ceramic transducers hich comprises heating the transducer at a temperature from 900.degree. C to 1000.degree. C in a nonreducing atmosphere containing at least 20 volume percent of oxygen for at least one hour.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: November 7, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Basil E. Walker, Robert C. Pohanka, Roy W. Rice