Patents by Inventor Donald J. Bach

Donald J. Bach 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).

  • Simulated natural sponge based on hydrophilic polyurethane
    Patent number: 4160076
    Abstract: The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams which simulate natural sponges and prepared by reacting an isocyanate capped polyoxyethylene polyol reactant with an aqueous reactant and a carefully balanced combination of a nonionic surface-active agent and a liquid defoaming agent. The resultant foams are characterized by a majority of large size cells and membranes which themselves are foamed with small cells.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: July 3, 1979
    Assignee: W. R. Grace & Co.
    Inventors: James L. Guthrie, Donald J. Bach