Patents by Inventor Jan Hendik Hunik

Jan Hendik Hunik 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 vitamin b12
    Patent number: 6492141
    Abstract: The present invention relates to a process for producing vitamin B12, wherein said process comprises the steps of (a) culturing a strain of the genus Propionibacterium in a first fermenter under anaerobic conditions to obtain a culture of Propionibacterium, (b) transferring at least part of the culture obtained in (a) to a second fermenter and subjecting this culture to oxygen, (c) replacing in the first fermenter part of the volume transferred in (b) with fresh culture medium and (d) repeating steps (a), (b) and (c) at least once.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: December 10, 2002
    Assignee: DSM N.V.
    Inventor: Jan Hendik Hunik