Patents by Inventor Erwin Janousch

Erwin Janousch 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).

  • Use of thioindigo for obtaining fluorescent dyeings in polyvinyl chloride
    Patent number: 3937666
    Abstract: A process for the fluorescent dyeing of polyvinyl chloride which consists in incorporating thioindigo into a composition consisting essentially of polyvinyl chloride, and the fluorescent dyed polyvinyl chloride composition thus produced.
    Type: Grant
    Filed: July 25, 1973
    Date of Patent: February 10, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hugo Schafer, Erwin Janousch