Patents by Inventor Nancy M. Ham

Nancy M. Ham 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).

  • Diethyl toluene diamine hardener systems
    Patent number: 4540750
    Abstract: A resinous hardener system comprising the reaction product of diethyl toluene diamine and an epoxide having a functionality of at least two, the hardener being capable of incorporation into a variety of epoxy and urethane resins.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: September 10, 1985
    Assignee: Ciba-Geigy Corporation
    Inventor: Nancy M. Ham
  • Castable polyurethane systems
    Patent number: 4476292
    Abstract: A castable polyurethane system comprising the reaction product of (1) a polyisocyanate prepolymer prepared by reacting an excess of a polyisocyanate compound with an amine-based polyol and (2) a polyol, said polyurethane systems being clear, hard, easily cast, impact resistant, heat resistant and appropriate for a number of applicable uses.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: October 9, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Nancy M. Ham, Teruko Miyazaki