Patents by Inventor Ernest R. Hayes

Ernest R. Hayes 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).

  • N,O-carboxymethyl chitosan and preparative method therefor
    Patent number: 4619995
    Abstract: A novel chitosan derivative, having carboxymethyl substituents on some of both the amino and primary hydroxyl sites of the glucosamine units of the chitosan structure, is disclosed, together with methods for its preparation starting from either chitosan or chitin.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: October 28, 1986
    Assignee: Nova Chem Limited
    Inventor: Ernest R. Hayes