Patents by Inventor Elizabeth G. Varney

Elizabeth G. Varney 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).

  • Bleaching aid
    Patent number: 3956165
    Abstract: The present invention is directed to pulp bleaching processes, and in particular compositions for use in the bleaching process to enhance the efficiency of the process. It was discovered that if a low molecular weight water soluble polymer of acrylic acid, or water soluble salt thereof was added either alone or together with a carboxymethyl cellulose to the bleaching solution, that less bleaching solution was required.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: May 11, 1976
    Assignee: Betz Laboratories, Inc.
    Inventors: Gerald D. Hansen, Elizabeth G. Varney, Philip S. Davis