Patents by Inventor Philip C. Wingert

Philip C. Wingert 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).

  • Erosion resistant Ag-SnO.sub.2 electrical contact material
    Patent number: 4904317
    Abstract: An erosion resistant electrical contact material and a method of making the material is described. The material comprises from about 10 to about 20 volume percent of SnO.sub.2, from about 0.45 to about 1.2 volume percent of an oxide selected from the group consisting of TiO.sub.2, CeO.sub.2, ZrO.sub.2, HfO.sub.2, and combinations thereof and the balance being substantially silver.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: February 27, 1990
    Assignee: Technitrol, Inc.
    Inventors: Shinhoo Kang, Charles Brecher, Philip C. Wingert
  • Electrical contact material of Ag, SnO.sub.2, GeO.sub.2 and In.sub.2 O.sub. 3
    Patent number: 4817695
    Abstract: A material for electrical contact use has the following composition: 6 to 18 percent tin oxide, 0.25 to 1% germanium oxide, 0.2 to 2% indium oxide, balance silver, all percentages by weight. The material exhibits superior erosion characterstics.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: April 4, 1989
    Inventors: Philip C. Wingert, Charles Brecher, Han J. Kim, Shinhoo Kang