Patents by Inventor Erwin Plaza

Erwin Plaza 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).

  • Transfer printing process
    Patent number: 4209297
    Abstract: Fabrics of preferrably polyester fibres can be printed in deep yellow colors with good fastness properties if dyestuffs of the formula ##STR1## wherein X denotes hydrogen, chlorine, methyl, nitro, CF.sub.3 or cyano,Y denotes methyl, methoxy, nitro or chlorine or cyano andZ denotes hydrogen, methyl, chlorine or cyano,R.sub.1 /R.sub.2 representing hydrogen, chlorine, methyl or methoxy, with the proviso that R.sub.1 and/or R.sub.2 denote chlorine, methyl or methoxy if X represents a nitro group,are used according to the transfer printing principle.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: June 24, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunter Stephan, Hartmut Birmes, Artur Haus, Erwin Plaza