Patents by Inventor Albert De Graaf

Albert De Graaf 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 fermentative production of L-amino acids using coryneform bacteria
    Patent number: 6355454
    Abstract: This invention relates to a process for the production of L-amino acids using coryneform bacteria, in which the glutamate dehydrogenase gene is amplified.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: March 12, 2002
    Assignee: Degussa Huls AG
    Inventors: Achim Marx, Bettina Mockel, Walter Pfefferle, Hermann Sahm, Albert De Graaf, Lothar Eggeling
  • Apparatus for throughflow NMR spectroscopy, especially for cell suspensions
    Patent number: 5313162
    Abstract: A combined fermenter and measuring tube for NMR throughflow spectroscopy on cell suspensions in which the measurement tube has a capacity of 3 to 20 ml in the measuring zone of the magnet and a fermenter is a premagnetization reservoir of greater cross section of a capacity of at least 100 ml in the repolarization range. A liquid circulator is provided to provide a throughflow rate of 5 to 250 ml/s in the measuring tube.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: May 17, 1994
    Assignee: Forschungszentrum Julich GmbH
    Inventors: Albert De Graaf, Ulrich Probst