Patents by Inventor Karl-Ulrich Buhler

Karl-Ulrich Buhler 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).

  • Disperse dyestuff mixtures
    Patent number: 5910624
    Abstract: Disperse Dyestuff Mixtures comprising C.I. Disperse Red 82 of the formula (I) ##STR1## and one or more dyestuffs which differ therefrom, of the formula (II) ##STR2## wherein D denotes the radical of a diazo component of the formula ##STR3## or D denotes the radical of a diazo component from the group consisting of 5,6-dichlorobenzothiazol-2-yl, 6,7-dichlorobenzothiazol-2-yl, 6-nitro-benzothiazol-2-yl or 5-nitrothiazol-2-yl, and the other substituents have the meaning given in the description,are stable to spray-drying and have outstanding use properties, in particular in the dyeing of hydrophobic fiber materials.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: June 8, 1999
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Klaus-Wilfried Wanken, Karl-Ulrich Buhler