Patents by Inventor Ian Weddell

Ian Weddell 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).

  • Azo disperse dye mixtures
    Patent number: 6682573
    Abstract: The present invention refers to a dye mixture comprising an azo dye of the formula (I) wherein each of X and X1 independently is chlorine or bromine; R1 is absent or is C1-4 alkyl; and each of R2 and R3 independently is hydrogen, C1-6 alkyl or cyanoethyl; but when R1 is absent, R2 is n-butyl or cyanoethyl and R3 is cyanoethyl; and further dye components according to claim 1, a method for the preparation of such mixtures and a method for coloring a synthetic textile material or fiber blend thereof using such mixtures.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: January 27, 2004
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: David Brierley, Ian Weddell, David Newton
  • Azo disperse dye mixtures
    Publication number: 20020040510
    Abstract: The present invention refers to a dye mixture comprising an azo dye of the formula (I) 1
    Type: Application
    Filed: September 13, 2001
    Publication date: April 11, 2002
    Inventors: David Brierley, Ian Weddell, David Newton