Patents by Inventor Ralf Klasen

Ralf Klasen 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).

  • Microbiological method of making 5-ketogluconate
    Patent number: 5804423
    Abstract: A method is disclosed for preparing 5-ketogluconate, which comprises the steps of:(a) genetically modifying a microorganism capable of microbiologically producing 5-ketogluconate to increase gluconate NADP.sup.+ -5-oxidoreductase gene expression of said microorganism;(b) culturing said microorganism in a medium to produce 5-ketogluconate; and(c) recovering 5-ketogluconate from said medium.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: September 8, 1998
    Assignees: Forschungszentrum Julich GmbH, Rhein Biotech GmbH
    Inventors: Ralf Klasen, Stephanie Bringer-Meyer, Hermann Sahm, Cornelies Petrus Hollenberg
  • Method of preparing tartaric acid
    Patent number: 5763656
    Abstract: A method of preparing tartaric acid in which 5-ketogluconate is oxidized in a carbonate buffer at an alkaline pH preferably in the range of 8 to 10 using vanadate.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: June 9, 1998
    Assignee: Forschungszentrum Julich GmbH
    Inventors: Ralf Klasen, Hermann Sahm, Ingo Matzerath, Wolfgang Klaui