Patents by Inventor Duane L. Schreiner

Duane L. Schreiner 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).

  • Contact glass composition for use in spark plugs
    Patent number: 6426586
    Abstract: A contact glass composition for use in resistor-type spark plugs is described. The contact glass composition is a mixture of: (a) at least one metal; (b) graphite; and (c) silicon. Additionally, borosilicate glass, barium borate glass, magnesium aluminum silicate, ball clay, and aluminum may also be included in the contact glass composition.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: July 30, 2002
    Assignee: AlliedSignal Inc.
    Inventors: Ching T. Young, Philip R. Woodruff, Duane L. Schreiner, Harold E. Dunfee, Ralph Frederick, Jeff A. Goldacker