Patents by Inventor Lutz Kienitz

Lutz Kienitz 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 producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong's acid)
    Patent number: 4348334
    Abstract: A process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid by sulfonating naphthalene, nitrating the sulfonation product, and separating the pure magnesium salt of 3-nitronaphthalene-1,5-disulfonic acid, which process comprises:(a) sulfonating naphthalene with liquid SO.sub.3 in the presence of an inert organic solvent at temperatures between -40.degree. and +20.degree. C.
    Type: Grant
    Filed: January 18, 1980
    Date of Patent: September 7, 1982
    Assignees: Ciba-Geigy AG, Bayer Aktiengesellschaft
    Inventors: Bernhard Albrecht, Hans Frey, Vinzenz Habermacher, Horst Behre, Lutz Kienitz, Wolfgang Schenk, Guido Steffan, Axel Vogel
  • Process for the preparation of 4-nitroso-diphenyl-amine
    Patent number: 4324913
    Abstract: A process for the preparation of 4-nitroso-diphenylamine by rearranging N-nitroso-diphenylamine according to Fischer-Hepp to o-dichlorobenzene, under the effect of alcoholic hydrochloric acid and working up the suspension of the 4-nitroso-diphenylamine-hydrochloride.
    Type: Grant
    Filed: September 2, 1980
    Date of Patent: April 13, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karlfried Wedemeyer, Lutz Kienitz