Patents by Inventor Wolfgang Haebler

Wolfgang Haebler 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 preparing navy dyeings on polyester fibers using mixture of blue and red azo dyes
    Patent number: 4743269
    Abstract: Navy polyester dyeings which are produced by means of dyestuff mixtures based on azo dyestuffs from 2,4-dinitro-6-cyanoaniline and 3-acylamino-dialkylaminoanilines are distinguished by a very good wash fastness on using peroxide-containing domestic washing agents. Preferably the dyestuff formulations used contain a weakly acidic buffer system.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: May 10, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Haebler, Heinz Geiger, Hans-Gunter Otten, Horst Brandt
  • Exhaust process for the dyeing of synthetic fiber materials
    Patent number: 3992143
    Abstract: Exhaust process for the dyeing of synthetic fiber materials from organic water-immiscible solvents wherein are used as dyestuffs dis- and trisazo dyestuffs which contain at least 2 hydroxyl groups and which are free from sulfonic acid and carboxyl groups and which correspond to the formulaA--N=N--B--N=N--Din which A, D and B have the meaning given below in the disclosure. By means of these dyestuffs there are obtained dyeings in excellent dyestuff yields and fastness properties.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: November 16, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Richard Sommer, Wolfgang Haebler