Patents by Inventor Charles William McGregor

Charles William McGregor 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).

  • Polyesterimides and processes for preparing same
    Patent number: 4075179
    Abstract: Polyesterimide polymers are provided as well as processes for preparing the same. Polyesterimide compositions are provided which can be applied as a magnet wire coating with the resulting magnet wire exhibiting excellent flexibility, heat shock, dielectric, and thermal properties. Such polyesterimide compositions can function as hot melt coating compositions for application as a magnet wire coating in a solventless process.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: February 21, 1978
    Assignee: Essex International, Inc.
    Inventors: Joseph Karkoski, Charles William McGregor, Lionel Joseph Payette