Patents by Inventor Charles A. Cornman

Charles A. Cornman 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).

  • Amine-based, hexavalent chromium reducing agents for cement
    Patent number: 6872247
    Abstract: Methods and compositions involving hexavalent chromate-reducing agents, particularly hydroxylamine, hydrazine, or their salts or derivatives, for use in cement compositions and cement processing.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: March 29, 2005
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Leslie A. Jardine, Charles A. Cornman, Felek Jachimowicz