Patents by Inventor Leif Arne Kallstrom

Leif Arne Kallstrom 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).

  • Steroid esters
    Patent number: 5888995
    Abstract: The invention concerns compounds of formula I ##STR1## in which R.sub.1 is hydrogen or a straight or branched hydrocarbon chain; R.sub.2 is hydrogen or a straight or branched hydrocarbon chain; R.sub.3 is acyl; X.sub.1 is hydrogen, fluorine or chlorine; and X.sub.2 is hydrogen, fluorine or chlorine. Also disclosed are processes for preparation of the compounds, pharmaceutical compositions containing them and methods employing the compounds in the treatment of inflammatory and allergic conditions.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: March 30, 1999
    Assignee: Astra Aktiebolag
    Inventors: Bengt Ingemar Axelsson, Ralph Lennart Brattsand, Leif Arne Kallstrom, Bror Arne Thalen