Patents by Inventor Johannes Jeths

Johannes Jeths 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 the differential dyeing of polyamide fibers and of materials containing them
    Patent number: 3995993
    Abstract: It had been found that the dyestuff of the formula ##STR1## is very suitable in a differential dyeing process for the dyeing of polyamide fiber materials at a pH of 2 to 9; the dyestuff possesses a very good differentiating behavior and migrating behavior yielding dyeings of a high degree of evenness while it does not dye accompanying non-polyamide fibers, not even in traces.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: December 7, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Schlafer, Maria Kallay, Johannes Jeths