Patents by Inventor O. James Straley

O. James Straley 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 of making an electrical device comprising a conductive polymer composition
    Patent number: 5181006
    Abstract: A polymer thick film ink which exhibits PTC behavior comprising an organic polymer which is crystalline, an active solvent suitable for dissolving the polymer, and carbon black which has a pH of less than 4.0. The ink is particularly useful in producing electrical devices such as heaters and circuit protection devices.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: January 19, 1993
    Assignee: Raychem Corporation
    Inventors: Jeff Shafe, O. James Straley, Gordon McCarty, Ravinder K. Oswal, Amitkumar N. Dharia
  • Conductive polymer composition
    Patent number: 5093036
    Abstract: A polymer thick film ink which exhibits PTC behavior comprising an organic polymer which is crystalline, an active solvent suitable for dissolving the polymer, and carbon black which has a pH of less than 4.0. The ink is particularly useful in producing electrical devices such as heaters and circuit protection devices.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: March 3, 1992
    Assignee: Raychem Corporation
    Inventors: Jeff Shafe, O. James Straley, Ravinder K. Oswal, Gordon McCarty, Amitkumar N. Dharia
  • Conductive polymer composition
    Patent number: 4980541
    Abstract: Electrical devices with improved resistance stability comprise a PTC element comprising a conductive polymer and two electrodes. The conductive polymer composition comprises an organic crystalline polymer and carbon black with a pH of less than 5.0. Particularly preferred conductive polymer compositions comprise carbon blacks which have a pH of less than 5.0, a dry resistivity R.sub.CB and a particle size D in nanometers such that R.sub.CB /D is at most 0.1. Electrical devices of the invention include heaters and circuit protection devices.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: December 25, 1990
    Assignee: Raychem Corporation
    Inventors: Jeff Shafe, O. James Straley, Gordon McCarty, Ravinder K. Oswal, Bernadette A. Trammell