Patents by Inventor Rudolph J. Berndlmaier

Rudolph J. Berndlmaier 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).

  • Crosslinked vinyl acetate-maleic anhydride heteropolymers and derivatives prepared from them
    Patent number: 3956244
    Abstract: Novel crosslinked heteropolymers of vinyl acetate and maleic anhydride are provided which are useful as aqueous thickeners for aqueous formulations such as cosmetics and latex paints. Ester and amide derivatives of the combined maleic anhydride portion of the heteropolymer are also provided. The process for preparing the crosslinked heteropolymers comprises adding a maleic anhydride monomer, and crosslinking agent monomer, and catalyst in controlled amounts to a monomer solution of vinyl acetate.
    Type: Grant
    Filed: December 24, 1974
    Date of Patent: May 11, 1976
    Assignee: N L Industries, Inc.
    Inventors: William G. Carpenter, Daniel F. Herman, Rudolph J. Berndlmaier