Patents by Inventor Hans-Jurgen Arpe

Hans-Jurgen Arpe 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 preparing 2-ethyl-pyridine
    Patent number: 3957792
    Abstract: Process for the manufacture of 2-ethyl-pyridine from 2-methyl-pyridine and methanol in the gaseous phase with a catalyst consisting essentially of silicon dioxide and oxides of metals of the second and/or third main group or subgroup and/or the fifth main group of the periodic system of elements at elevated temperatures.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: May 18, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Jurgen Arpe, Hansjorg Hey
  • Methylation of cyclohexanone with simultaneous dehydrogenation
    Patent number: 3932518
    Abstract: Catalytic process for alkylating ketones carrying at least one methyl or methylene group in .alpha.-position to the carbonyl group by reacting them with primary alcohols in the presence of copper and/or silver catalysts.
    Type: Grant
    Filed: November 21, 1973
    Date of Patent: January 13, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Hans-Jurgen Arpe