Patents by Inventor Stephen E. Summers

Stephen E. Summers 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).

  • High solids polyamide-imide magnet wire enamel
    Patent number: 4374221
    Abstract: A high solids content, low molecular weight polymer, low viscosity polyamide-imide enamel is described. The enamel is a reaction product of polyisocyanate, trimellitic anhydride, and an isocyanate blocking alcohol having a ratio of free isocyanate to total carboxyl and anhydride groups of 0.99:1 to 0.85:1. The method of making the enamel and the method of coating electrical conductors such as magnet wire with such enamel are also disclosed.
    Type: Grant
    Filed: November 17, 1981
    Date of Patent: February 15, 1983
    Assignee: Essex Group, Inc.
    Inventors: Charles W. McGregor, Stephen E. Summers