Patents by Inventor Herbert Odenbach

Herbert Odenbach 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 continuous production of 2-phosphone-butane-1,2,4-tricarboxylic acid and alkali metal salts thereof
    Patent number: 4931586
    Abstract: This invention relates to an improved process for the continuous production of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC) and alkali metal salts thereof, in which dialkylphosphite, and ethene-1,2-dicarboxylic acid dialkyl ester, are reacted in the presence of a basic catalyst to form phosphonosuccinic acid tetraalkyl ester, the ester thus obtained is directly reacted with alkyl-acrylate, in the presence of an alkaline catalyst and the reaction product thus obtained is directly hydrolyzed to PBTC or alkali metal salts thereof.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: June 5, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Roland Kleinstuck, Cornelia Lensch, Michael Immenkeppel, Hans-Dieter Block, Herbert Odenbach