Patents by Inventor Thomas J. D. Heyer

Thomas J. D. Heyer 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).

  • Stress control for termination of a high voltage cable
    Patent number: 6015629
    Abstract: A two-part system for electrical stress control includes a non-tacky conformable stress control material that is positioned at the shield cut edge of a prepared power cable and a stress control tube over the non-tacky conformable stress control material. A second region of conformable stress control material is positioned adjacent the cut end of the insulation.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: January 18, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Thomas J. D. Heyer, Robert A. Wandmacher, Lawrence C. Chor, John T. Larson
  • Epihalohydrin electrical stress controlling material
    Patent number: 5962569
    Abstract: A non-tacky electrical stress control material comprisinga) about 100 parts of a resin component containing1) from about 20% to about 80% of an epihalohydrin polymer, and2) correspondingly, from about 80% to about 20% of an insulating silicone polymer having a tan .delta. of less than one,b) from about 10 to about 200 parts of a filler, said filler being nonconductive at room temperature, selected from the group consisting of barium titanate and hydrated aluminum silicate, andc) from 0 to 30 parts of a plasticizer.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: October 5, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: Thomas J. D. Heyer, Robert A. Wandmacher
  • Epihalohydrin electrical stress controlling material
    Patent number: 5804630
    Abstract: A non-tacky electrical stress control material comprisinga) about 100 parts of a resin component containing1) from about 20% to about 80% of an epihalohydrin polymer, and2) correspondingly, from about 80% to about 20% of an insulating silicone polymer having a tan .delta. of less than one,b) from about 10 to about 200 parts of a filler, said filler being nonconductive at room temperature, selected from the group consisting of barium titanate and hydrated aluminum silicate, andc) from 0 to 30 parts of a plasticizer.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: September 8, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Thomas J. D. Heyer, Robert A. Wandmacher