Patents by Inventor Robert Estermann

Robert Estermann 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 enzymatic hydrolysis of a carboxylic acid derivative
    Patent number: 5278054
    Abstract: A process for the enzymatic hydrolysis of a carboxylic acid derivative by dissolving the carboxylic acid derivative in an organic solvent which is miscible with water only to a slight extent, saturation of the organic solution with water, bringing the water-saturated organic solution into contact with a hydrolase, the hydrolysis taking place, after which the reaction solution is saturated with water again and brought into contact with the hydrolase and subsequently with water again until the desired degree of conversion is achieved.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: January 11, 1994
    Assignee: Chemie Linz Gesellschaft m.b.H.
    Inventors: Maria Buchner, Robert Estermann, Herbert Mayrhofer, Gerald Banko
  • Extracting agents for poly-D(-)-3-hydroxybutyric acid
    Patent number: 4968611
    Abstract: Use of diols or acetalized triols, di- or tricarboxylic acid esters, mixtures of dicarboxylic acid esters or butyrolactone as extracting agents for obtaining pure polyesters or copolyesters containing 3-hydroxybutyric acid units.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: November 6, 1990
    Assignee: Petrochemie Danubia Gesellschaft m.b.H.
    Inventors: Heinz Traussnig, Engelbert Kloimstein, Hans Kroath, Robert Estermann