Patents by Inventor John Densley

John Densley 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).

  • Electrical tree suppression in high-voltage polymeric insulation
    Patent number: 4870121
    Abstract: Polymeric dielectrics which are exposed to highly divergent electric fields break down more quickly than expected because of the generation of ultra-violet radiation at defect points which degrades the polymer locally and leads to the formation of electrical trees in a polymeric insulation. The use of ultra-violet stabilizers, preferably in combination with reduced concentration of oxygen in the polymer, significantly extends the time to initiation of electrical treeing by preventing photodegradation of the polymer.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: September 26, 1989
    Assignee: Canadian Patents & Development Ltd.
    Inventors: Soli S. Bamji, Aleksander T. Bulinski, John Densley