Patents by Inventor Harry W. Wolfe, Jr.

Harry W. Wolfe, Jr. 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).

  • Patent number: 4183836
    Abstract: A water-based polyurethane dispersion is prepared by mixing an aliphatic diisocyanate with three critical active hydrogen compounds, to form a prepolymer containing carboxyl groups and free isocyanate groups, then dispersing the prepolymer in an aqueous medium containing a tertiary amine, which converts the carboxyl groups to carboxylate ions, and a diamine, which chain-extends the prepolymer through its --NCO groups. These aqueous dispersions are storage-stable for at least several months and are useful in many coating applications, among others, for coating textile materials.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: January 15, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harry W. Wolfe, Jr.