Patents by Inventor Armin Haag

Armin Haag 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).

  • Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid
    Patent number: 6160169
    Abstract: A process for preparing amine salts of 4-nitrotoluene-2-sulfonic acid by sulfonation of nitrotoluene with oleum, subsequent dilution of the reaction mixture with water and extraction with lipophilic amines, wherein the acidic aqueous solution of the sulfonation product is partially neutralized with mineral bases. The compounds prepared according to the invention are particularly suitable for preparing dyes.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: December 12, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Bermes, Armin Haag, Hellmut Kast, Peter Krotzsch
  • Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid
    Patent number: 5892105
    Abstract: A process for preparing amine salts of 4-nitrotoluene-2-sulfonic acid by sulfonation of nitrotoluene with oleum, subsequent dilution of the reaction mixture with water and extraction with lipophilic amines, wherein the acidic aqueous solution of the sulfonation product is partially neutralized with mineral bases.The compounds prepared according to the invention are particularly suitable for preparing dyes.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: April 6, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Bermes, Armin Haag, Hellmut Kast, Peter Krotzsch
  • Removal of nobler metal ions than iron from process and waste waters
    Patent number: 5169538
    Abstract: The application relates to a process for removing nobler metal ions than iron, especially copper ions, from acidic process and waste waters by reduction under an inert gas atmosphere with carbonyl iron powders which have previously been subjected to a thermal treatment with hydrogen to remove nitrides and carbides. This process results in residual metal ion content <0.5 ppm and thus complete removal of the metal ions to be reduced.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: December 8, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgag Habermann, Armin Haag, Wolfgang Kochanek
  • Pigment formulations for use in surface-coating binders
    Patent number: 4137213
    Abstract: Pigment formulations and their use.The formulations contain pigments, organic solvents and from 10 to 80% by weight of a wetting agent consisting of a non-ionic organic compound which has a viscosity of from 500 to 10,000 mPa.s and has been produced by reacting an alkylated amide/formaldehyde reaction product and an epoxy resin, which may or may not be modified, in a weight ratio of from 9:1 to 1:9. They are used as additives in surface-coating binders, especially in cationic electrocoating finishes.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: January 30, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Erich Gulbins, Armin Haag, Ruprecht Kroker