Patents by Inventor John William Hirzy

John William Hirzy 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).

  • Modified polyester polyblends and preparation thereof
    Patent number: 4049611
    Abstract: Polyblends are disclosed comprising terminated polyesters, coupled polyesters derived from partially terminated polyesters and coupled polyesters derived from non-terminated polyesters. The polyblends are prepared by reacting a dicarboxylic acid, a glycol and a monocarboxylic acid or monohydric alcohol under esterification conditions and subsequently treating the reaction mixture with a polyfunctional coupling agent. The polyblends are useful as plasticizers for film-forming vinyl halide polymers.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: September 20, 1977
    Assignee: Monsanto Company
    Inventor: John William Hirzy