Patents by Inventor Dean Vincent Johnson

Dean Vincent Johnson 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 selective reduction
    Patent number: 6355822
    Abstract: Process for the stereoselective reduction of chiral &agr;- or &bgr;-keto esters which have a chiral center in the &ggr; position in an inert solvent at temperatures from −80 to +50° C. using a reductant obtained by reaction of NaBH4 and (D)- or (L)-tartaric acid, to give the corresponding diastereomeric hydroxy compounds in each case.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: March 12, 2002
    Assignee: DSM Fine Chemicals Austria Nfg GmbH & CoKG
    Inventors: Dean Vincent Johnson, Peter Pöchlauer, Herfried Griengl