Patents by Inventor Ernst Fuerst

Ernst Fuerst 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).

  • Removal of CO.sub.2 and/or H.sub.2 S and/or COS from gases containing these constituents
    Patent number: 4336233
    Abstract: An aqueous solution containing from 0.81 to 1.3 moles of piperazine per liter is used as a washing agent for removing impurities such as H.sub.2 S, CO.sub.2 and COS from gases. Piperazine can also be used, in amounts of up to 0.8 mole per liter, together with physical or chemical solvents, to accelerate the absorption of H.sub.2 S, CO.sub.2 and COS. The washing process is used for natural gases, coke-oven gases, gases from the gasification of coal and synthesis gases, of any origin.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: June 22, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Max Appl, Ulrich Wagner, Hans J. Henrici, Klaus Kuessner, Klaus Volkamer, Ernst Fuerst
  • 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