Patents by Inventor Hans-Juergen Pitz

Hans-Juergen Pitz 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 the production of 4-alkylpyrimidine
    Patent number: 7179914
    Abstract: 4-alkylpyrimidine is produced by reacting formamide with a formyl methyl alkyl ketone diacetal without the addition of water at a temperature that allows removal of the 4-alkylpyrimidine from the reaction mixture by distillation. The process is readily applicable on an industrial scale and succeeds without the addition of water or ammonium chloride as a catalyst and permits the production of 4-alkylpyrimidine in good yields and excellent purities without time-consuming extraction steps.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: February 20, 2007
    Assignee: Degussa AG
    Inventors: Hans Henniges, Hans-Juergen Pitz, Christoph Theis, Manfred Neumann
  • Process for the production of 4-alkylpyrimidine
    Publication number: 20040225126
    Abstract: 4-alkylpyrimidine is produced by reacting formamide with a formyl methyl alkyl ketone diacetal without the addition of water at a temperature that allows removal of the 4-alkylpyrimidine from the reaction mixture by distillation. The process is readily applicable on an industrial scale and succeeds without the addition of water or ammonium chloride as a catalyst and permits the production of 4-alkylpyrimidine in good yields and excellent purities without time-consuming extraction steps.
    Type: Application
    Filed: February 17, 2004
    Publication date: November 11, 2004
    Applicant: DEGUSSA AG
    Inventors: Hans Henniges, Hans-Juergen Pitz, Christoph Theis, Manfred Neumann