Patents by Inventor Dominic R. Perna

Dominic R. Perna 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 covered calender rolls
    Patent number: 4705711
    Abstract: Calender roll comprising a cylindrical metal shaft bearing a polyimide cover, wherein the shaft is knurled to eliminate slippage between the shaft and the cover.
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: November 10, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dominic R. Perna