Patents by Inventor Rudolf Rokohl

Rudolf Rokohl 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).

  • Dyeing process using quaternary ammonium salt as retarder
    Patent number: 4052159
    Abstract: Special quaternary ammonium salts derived from triaminoalkyl derivatives of hexahydrotriazine for use as retarders in the dyeing of anionic polyacrylonitrile fibers with basic dyes.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: October 4, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Ernst Fuerst, Jozsef Gerendas, Rudolf Rokohl, Rolf Fikentscher, Herbert Helfert
  • Production of level dyeings on acrylonitrile polymer fibers with basic dyes
    Patent number: 3945794
    Abstract: Acrylonitrile polymer fibers are dyed level shades with basic dyes using as leveling agent a quaternary ammonium salt containing two or three benzyl groups as nitrogen ligands.
    Type: Grant
    Filed: February 19, 1974
    Date of Patent: March 23, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Rokohl, Rolf Fikentscher, Herbert Helfert