Patents by Inventor David McMullan

David McMullan 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).

  • Process for dyeing or printing hydroxyl group containing fiber materials
    Patent number: 5542956
    Abstract: The invention relates to a process for dyeing or printing hydroxyl group containing fiber materials, which comprises using at least one yellow or orange dyeing dye of formula ##STR1## wherein the substituents are as defined in claim 1, together with at least one blue dyeing dye and/or at least one red dyeing dye. Level dyeings and prints with good allround fastness properties are obtained by the process of the invention.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: August 6, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: David McMullan, Rudolf Schaulin, Urs Lauk