Patents by Inventor Roger A. Champlin

Roger A. Champlin 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).

  • Method for preparing pigmented polyesters wherein the pigment glycol slurry is preheated
    Patent number: 3932345
    Abstract: There is disclosed an improvement in the pigmenting of polyesters derived from free dicarboxylic acids and glycols employing a slurry consisting of pigmenting agent and a glycol which improvement comprises heating said slurry to a temperature ranging from about 90.degree. C. to about 1.degree. to 2.degree. C. below the boiling point of the glycol constituent and adding the heated slurry to the polyester forming reactants when the temperature of said reactants ranges from about 210.degree. to 240.degree. C. and the pressure in the reaction vessel employed ranges from about 20 to 70 pounds per square inch gauge.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: January 13, 1976
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Roger A. Champlin