Patents by Inventor Karl Olaf Gelotte

Karl Olaf Gelotte 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).

  • Preparation of 5-amino-isophthalamides
    Patent number: 6441235
    Abstract: A process for preparing 5-amino-N,N′-bis(R)isophthalamides, where A is 2,3-dihydroxypropyl or 1,3-dihydroxyisopropyl, useful as intermediates in preparing iodinated diagnostic agents, which comprises reacting a di-lower-alkyl 5-nitroisophthalate with a compound of the formula RNH2 in the presence of a basic catalyst and without isolating the intermediate 5-nitro-N,N′-bis(R)isophthalamide, catalytically hydrogenating the latter.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: August 27, 2002
    Assignee: Amersha, Health AS
    Inventors: Edward David Parady, Karl Olaf Gelotte
  • Preparation of 5-amino-isophthalamides
    Publication number: 20020095053
    Abstract: A process for preparing 5-amino-N,N′-bis(R)isophthalamides, where A is 2,3-dihydroxypropyl or 1,3-dihydroxyisopropyl, useful as intermediates in preparing iodinated diagnostic agents, which comprises reacting a di-lower-alkyl 5-nitroisophthalate with a compound of the formula RNH2 in the presence of a basic catalyst and without isolating the intermediate 5-nitro-N,N′-bis(R)isophthalamide, catalytically hydrogenating the latter.
    Type: Application
    Filed: May 14, 2001
    Publication date: July 18, 2002
    Inventors: Edward David Parady, Karl Olaf Gelotte