Patents by Inventor Frans Hoeks

Frans Hoeks 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 oxidation of methyl groups
    Patent number: 5213973
    Abstract: A microbiological process for oxidation of methyl groups in aromatic 5- or 6-ring heterocycles to the corresponding carboxylic acid. The reaction of the heterocycle takes place by microorganisms of the genus Pseudomonas, which utilize toluene, xylene or cymene. An inducer, the aromatic heterocycle, as the substrate, and a carbon source and energy source are fed in and, after the maximal product concentration is reached, the product is separated.
    Type: Grant
    Filed: July 3, 1991
    Date of Patent: May 25, 1993
    Assignee: Lonza Ltd.
    Inventor: Frans Hoeks
  • Process for the production of 6-hydroxynicotinic acid
    Patent number: 5151351
    Abstract: A process for the production of 6-hydroxynicotinic acid from nicotinic acid by means of enzymatic hydroxylation in the presence of microorganisms of the genera Pseudomonas, Bacillus or Achromobacter. By maintaining a specific concentration range during the addition of nicotinic acid, the biomass formation can take place in the same process step as the product formation, without product losses occurring by further decomposition.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: September 29, 1992
    Assignee: Lonza Ltd.
    Inventors: Frans Hoeks, Daniel Venetz