Patents by Inventor Friedrich Muller-Hauck

Friedrich Muller-Hauck 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).

  • Method for producing 3-hydroxy-2-methylbenzoic acid
    Publication number: 20050222455
    Abstract: The invention relates to a method for producing 3-hydroxy-2-methylbenzoic acid or solutions containing salts of 3-hydroxy-2-methylbenzoic acid, with naphthalene as the starting substance. Said method essentially comprises the following steps: sulfonation, reaction with alkalis at high temperatures and the expedient preparation of the resultant reaction mixture.
    Type: Application
    Filed: March 10, 2003
    Publication date: October 6, 2005
    Applicant: Bayer Chemicals AG
    Inventors: Friedrich Muller-Hauck, Johannes Scherer, Gerhard Schroeder, Horst Behre
  • Preparation of 3-acyloxy-2-methylbenzoic acids
    Patent number: 6891060
    Abstract: The invention relates to an improved process for preparing 3-acyloxy-2-methylbenzoic acids by heating substituted naphthalenes in the presence of alkali metal hydroxides and subsequently acylating.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: May 10, 2005
    Assignee: BayerAktiengesellschaft
    Inventors: Johannes Scherer, Horst Behre, Friedrich Müller-Hauck
  • Preparation of 3-acyloxy-2-methylbenzoic acids
    Publication number: 20040044243
    Abstract: The invention relates to an improved process for preparing 3-acyloxy-2-methylbenzoic acids by heating substituted naphthalenes in the presence of alkali metal hydroxides and subsequently acylating.
    Type: Application
    Filed: June 10, 2003
    Publication date: March 4, 2004
    Inventors: Johannes Scherer, Horst Behre, Friedrich Muller-Hauck