Patents by Inventor Werner Laubner

Werner Laubner 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 the preparation of ifosfamide having improved properties
    Patent number: 4882452
    Abstract: Ifosfamide having improved properties is obtained by crystallization from a solvent mixture selected from the group consisting of (a) a mixture of diethyl ether and a C.sub.1 -C.sub.3 alkanol or (b) a mixture of diisopropyl ether and a C.sub.1 -C.sub.3 alkanol under specific controlled conditions.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: November 21, 1989
    Assignee: Asta Pharma Akteingesellschaft
    Inventors: Jurgen Engel, Siegfried Muller, Werner Laubner