Patents by Inventor Warren E. Rayford

Warren E. Rayford 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 starch halohydrins and their nitrogen-containing substitution products
    Patent number: 4237271
    Abstract: Crosslinked starch is reacted with an epihalohydrin in the presence of a strong acid catalyst to produce the 3-halo-2-hydroxypropyl ether. Substitution of the halogen with nitrogen-containing compounds enables the preparation of novel water-insoluble cationic, anionic, and chelating starch ethers, as well as starch ethers having degrees of substitution heretofore unattainable in the prior art.
    Type: Grant
    Filed: April 24, 1979
    Date of Patent: December 2, 1980
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Warren E. Rayford, Robert E. Wing