Patents by Inventor Keyji Johnsen

Keyji Johnsen 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).

  • Chiral synthesis of 2-hydroxy carboxylic acids with a dehydrogenase
    Patent number: 6033882
    Abstract: Inter alia, an enzyme, a 2-hydroxy carboxylic acid dehydrogenase, characterised in that it is obtainable from Lactobacillus delbrueckii ssp. Bulgaricus and in that it catalyses the production of (R)-hydroxy derivatives of 2-keto acids, which are unsubstituted in the 3-position, but which may be substituted in the 4-position or beyond is disclosed.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: March 7, 2000
    Assignee: Genzyme Corporation
    Inventors: Joseph John Holbrook, Christine Louise Willis, Keyji Johnsen, Martin John Hateley