Patents by Inventor Andreas Keiner

Andreas Keiner 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 process for the production of 6-hydroxypyrazinecarboxylic acid
    Patent number: 5238829
    Abstract: A microbiological process for the production of 6-hydroxypyrazinecarboxylic acid and/or its salts with microorganisms using picolinic acid and/or its salts. The microorganisms grow with picolinic acid and/or its salts as the sole carbon, nitrogen and energy source. In this way the formed 6-hydroxypyrazinecarboxylic acid is accumulated in the medium and then isolated.
    Type: Grant
    Filed: August 27, 1992
    Date of Patent: August 24, 1993
    Assignee: Lonza Ltd.
    Inventor: Andreas Keiner