Patents by Inventor William S. Durrell

William S. Durrell 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).

  • Cyanamides of organic primary amines as epoxy curing agents
    Patent number: 4168364
    Abstract: Curable compositions are prepared comprising an epoxide compound or a mixture of epoxide compounds having an average of at least two epoxide groups per molecule, and as a curing agent, a cyanamide of an organic primary amine or a mixture of cyanamides of organic primary amines having an average of more than one cyanamide moiety per molecule. Such compositions are useful in molding, casting, laminating and coating applications.
    Type: Grant
    Filed: August 15, 1978
    Date of Patent: September 18, 1979
    Assignee: Ciba-Geigy Corporation
    Inventors: Raymond Seltzer, Joseph F. DiPrima, William S. Durrell
  • Process for the production of cyanogen chloride
    Patent number: 3944656
    Abstract: Production of cyanogen chloride by reacting hydrogen cyanide and chlorine in the gaseous phase in the presence of a low activity carbon catalyst.
    Type: Grant
    Filed: January 10, 1974
    Date of Patent: March 16, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: William S. Durrell, Robert J. Eckert, Jr.