Patents by Inventor Dick Malthe-Sorenssen

Dick Malthe-Sorenssen 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).

  • Yellow polymorph of 5-amino-2,4,6-triiodo-n,n?-bis(2-3-dihydroxypropy)-isophthalamide
    Patent number: 6337422
    Abstract: The yellow polymorph of 5-amino-2,4,6-triiodo-N,N′-bis(2,3-dihydroxypropyl)-isophthalamide is described.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: January 8, 2002
    Assignee: Nycomed Imaging AS
    Inventors: Dick Malthe-Sorenssen, Audun Aukrust
  • Preparation of tri-iodo benzene compounds
    Patent number: 6274762
    Abstract: The invention provides an improved process for the preparation of a compound containing a 2,4,6-triiodinated benzene ring, said process comprising reacting a 2,4,6-unsubstituted 5-amino-benzoic acid or derivative there of with an iodine halide iodinating agent in an aqueous reaction medium, characterised in that the iodinating agent is added to an aqueous medium containing the 5-amino-benzoic acid or derivative at two different temperature ranges: (A) one or more primary portions of the agent are added at a temperature in the range 40 to 70° C. and then one or more secondary portions of the agent are added at a temperature in the range 75 to 95° C. or (B) one or more primary portions of the agent are added at a temperature in the range 75 to 95° C. and then one or more secondary portions of the agent are added at a temperature of 60 to 70° C.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: August 14, 2001
    Assignee: Nycomed Imaging AS
    Inventors: Dick Malthe-Sorenssen, Ole Magne Homestad, Britt Sterud
  • Process for the production of iodinated organic x-ray contrast agents
    Patent number: 6232499
    Abstract: The present invention provides a process for the production of an organic iodinated X-ray contract agent, characterized in that process control comprises vibrational (e.g., infrared, Raman or preferably near-infrared) spectroscopic monitoring of the reaction mixture in at least one of the process steps, preferably one of the final reaction steps.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: May 15, 2001
    Assignee: Nycomed Imaging AS
    Inventors: Dick Malthe-Sørenssen, Anne Cathrine Schelver Hyni, Arne Aabye, Hans René Bjørsvik, Geir Brekke, Carl Einar Sjøgren