Patents by Inventor James V. Biggers

James V. Biggers 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).

  • Patent number: 4761711
    Abstract: A barrier layer ceramic capacitor and a method of making the same, using barium plumbate or modified barium plumbate as the base material. The fabricating process is a one step process requiring a maximum sintering temperature of 1000.degree. C.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: August 2, 1988
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Basavaraj V. Hiremath, Robert E. Newnham, Leslie E. Cross, James V. Biggers
  • Patent number: 4412148
    Abstract: A composite of PZT (Lead Zirconate Titanate) and a compliant polymer matrix aving 3-1 connectivity (i.e., in a diphasic material, one of the two phases is continuously self-connected in all three mutually perpendicular directions and the second phase is self-connected only along one of the three mutually perpendicular directions) and fabrication method thereof is described. An array of parallel PZT rod elements is embedded in a mechanically compliant polymer matrix with their axes along the direction of the poling electric field. Such a composite has a high value of g.sub.h, d.sub.h and g.sub.33 with very little sacrifice in the value of d.sub.33.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: October 25, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kenneth A. Klicker, Robert E. Newnham, Leslie E. Cross, James V. Biggers
  • Patent number: 4330593
    Abstract: PZT/polymer composites and a simplified method of their fabrication are dribed. Commercially available PZT Pb(Zr, Ti)O.sub.3 powder is thoroughly mixed with a binder such as polyvinylalcohol and polymethyl methacrylate (PMM) spheres and pressed into pellets. The binder and PMM spheres are burnt out by heating pellets slowly and the porous pellets so obtained are sintered by heating them in closed high-purity alumina crucibles and lead zirconate as a source of lead is added thereto. The highly porous pellets thus obtained are impregnated with a suitable polymer such as silicone rubber elastomer or vinylcyclohexene dioxide epoxy.
    Type: Grant
    Filed: November 13, 1980
    Date of Patent: May 18, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Thomas R. Shrout, Walter A. Schulze, James V. Biggers