Patents by Inventor Duane E. Tupper

Duane E. Tupper 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).

  • Salt stable starch graft polymers
    Patent number: 5130395
    Abstract: An aqueous, salt stable polymeric dispersion comprising the reaction product of a thinned, gelatinized starch and one or more vinyl monomers, said monomer(s) comprising at least 10% 1,3-butadiene by weight is disclosed.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: July 14, 1992
    Assignee: Penford Products Company
    Inventors: Charles C. Nguyen, Verne J. Martin, Gary R. Luebke, Edward P. Pauley, Duane E. Tupper