Patents by Inventor Walter Grosch

Walter Grosch 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).

  • 2-neopentylanthraquinone, processes for its preparation and methods for its use
    Patent number: 5107004
    Abstract: The novel compound 2-neopentylanthraquinone which is prepared by Friedel-Crafts acylation of neopentylbenzene with phthalic anhydride and subsequent cyclization of the resulting 2-(4-neopentylbenzoyl)-benzoic acid in the presence of a strong, anhydrous acid, is a catalyst for the preparation of hydrogen peroxide.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: April 21, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Manfred Eggersdorfer, Jochen Henkelmann, Walter Grosch
  • Acylation of aromatics
    Patent number: 4895984
    Abstract: Aromatics are acylated by the Friedel-Crafts method by carrying out the acylation in the presence of metalalkyls or metalalkyl halides of metals or semimetals of main groups two to five and/or of metals of subgroups two or four of the Periodic Table.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: January 23, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Manfred Eggersdorfer, Hardo Siegel, Alfred Schuhmacher, Walter Grosch, Jochem Henkelmann
  • Preparation of alkyl-substituted aromatic ketones
    Patent number: 4853481
    Abstract: Alkyl-substituted aromatic ketones are prepared by reacting alkylbenzenes with carboxylic anhydrides in the presence of a Friedel-Crafts catalyst by performing the reaction in the presence of a tertiary amine or diamine.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: August 1, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Jochem Henkelmann, Manfred Eggersdorfer, Walter Grosch, Alfred Schuhmacher, Hardo Siegel