Patents by Inventor Ronald Winsford Kenyon

Ronald Winsford Kenyon 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).

  • Polycyclic dyes
    Patent number: 6462204
    Abstract: The present invention refers to a polycyclic dye of the formula (I) wherein each of R1, R2, R4 and R5, independently, is hydrogen, alkyl or alkoxy; R3 is hydrogen, alkyl, optionally substituted alkoxy or amino; and Y is a straight or branched chain C1-8 alkylene group, methods for its preparation and a method for coloring synthetic fibre material or fibre blend thereof using such polycyclic dye.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: October 8, 2002
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Nigel Hall, Ronald Winsford Kenyon