Patents by Inventor Winfried Joentgen

Winfried Joentgen 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 preparation of aldehydes
    Patent number: 5059716
    Abstract: Aromatic and aliphatic aldehydes can be prepared from the corresponding aromatic or aliphatic carboxylic acids or the esters, anhydrides or halides thereof at elevated temperature by catalytic gas phase hydrogenation using hydrogen if use is made of a catalyst system composed of oxides of titanium and/or vanadium and of one or more co-metals, the co-metals being selected from the group consisting of chromium, molybdenum, cobalt, nickel, zinc, cadmium and copper.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: October 22, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Winfried Joentgen, Helmut Fiege