Patents by Inventor Charles J. Denham

Charles J. Denham 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).

  • Process for solubilizing formaldehyde oligomers
    Patent number: 5179232
    Abstract: A process for solubilizing solid formaldehyde oligomers without contaminating the solution product with undesirable solvent products by treating the oligomer with heated hydroxyacetic acid.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: January 12, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edward J. Balthazar, Harold E. Bellis, Charles J. Denham