Patents by Inventor Hans Olof Johansson

Hans Olof Johansson 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).

  • Separation method utilizing liquid-liquid partition
    Patent number: 6454950
    Abstract: A method for the separation of a predetermined compound comprising i) partitioning the compound in a two-phase (system A) in which at least one of the phases is rich (phase 1) and the other is poor (phase 2) in a thermoseparating polymer (I), ii) collecting one phase (phase 1 or phase 2) containing said compound, and iii if desired, further working up said compound from the phase collected in step ii, characterized a) in that polymer (I) is a micell-forming thermoseparating polymer, and b) in that phase 2 possibly contains at least one agent that is cloud point-decreasing for thermoseparating polymer (I), such as a polymer (II) that is incompatible with polymer (I) or a salt.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: September 24, 2002
    Assignee: Amersham Pharmacia Biotech AB
    Inventors: Folke Tjerneld, Josefine Persson, Hans Olof Johansson