Patents by Inventor Brigitte Delelis

Brigitte Delelis 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 production of 1,3-propanediol by fermentation
    Patent number: 6406895
    Abstract: The present invention relates to a process for the production of 1,3-propanediol by the fermentation of a 1,3-propanediol-producing microorganism in a fermentation medium containing glucose, characterized in that the fermentation is carried out without mechanical agitation, with the maintenance of an air retention greater than or equal to 50%, expressed as the volume of gas relative to the total volume of the liquid phase of the fermentation medium, and with the maintenance of a high cell density and a microorganism viability value, determined by a test A, greater than or equal to 95%, preferably of between 95 and 99%, by controlling frothing in the fermentation medium.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: June 18, 2002
    Assignee: Roquette Freres
    Inventors: Sophie Defretin, Brigitte Delelis, Laurent Segueilha