Patents by Inventor Harris B. David

Harris B. David 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).

  • Polyimide insulation with improved arc track resistance
    Patent number: 5104966
    Abstract: Novel polyimide based films are disclosed that are resistant to arc tracking and that include aromatic dianhydrides together with aromatic diamines and aliphatic diamines. The compositions contain from 5 to 20 percent by weight of the aliphatic diamine. These compositions maximize the thermal aging capability of the polyimide. The compositions are useful as films and laminates for wire and cable.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harris B. David