Patents by Inventor Chu K. Yung

Chu K. Yung 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).

  • Reactive dyes
    Patent number: 5197992
    Abstract: A water-soluble reactive dye of the formula:D.sup.1 --Z.sup.1 --NR.sup.1 --T--NR.sup.2 --Z.sup.2 --D.sup.2 (1)whereineach of D.sup.1 and D.sup.2, independently, represents the radical of a water-soluble chromophoric compound,each of Z.sup.1 and Z.sup.2, independently, represents a triazine or pyrimidine residue carrying an atom or group imparting fibre-reactivity to the dye,R.sup.1 represents an optionally substituted alkyl radical,R.sup.2 represents hydrogen or an optionally substituted alkyl radical, andT represents a 1,3- or 1,4-phenylene radical which may carry one or more substituents selected from halogen, alkyl, alkoxy, acylamino, nitro and carboxy.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: March 30, 1993
    Assignee: Imperial Chemical Industries PLC
    Inventors: John A. Taylor, Duncan A. S. Phillips, Chu K. Yung, Gerard Ellis