Patents by Inventor Jack Kirchner

Jack Kirchner 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).

  • Fluorochemical water and oil repellents
    Patent number: 6479612
    Abstract: A polymer having at least one urea linkage derived by contacting (1) at least one polyisocyanate, or mixture of polyisocyanates, (2) at least one fluorocarbon alcohol, fluorocarbon thiol or fluorocarbon amine, (3) at least one straight or branched chain alcohol, amine or thiol, and (4) at least one alcohol containing a sulfonic acid group or its salt, and then (5) optionally at least one linking agent useful for imparting oil repellency and water repellency to substrates.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: November 12, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Thomas Wayne Del Pesco, Jack Kirchner, Andrew H. Liu