Patents Assigned to Cu Chemie Uetikon GmbH
  • Racemic separation of ketamine
    Patent number: 6040479
    Abstract: The present invention is concerned with an improved process for the resolution of racemic 2-(o-chlorophenyl)-2-methylaminocyclohexanone (ketamine).
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: March 21, 2000
    Assignees: Goedecke Aktiengesellschaft, Cu Chemie Uetikon GmbH
    Inventors: Klaus Steiner, Stefan Gangkofner, Jean-Marie Grunenwald
  • Method for preparing a crystalline polymorph of terazosin monohydrochloride
    Patent number: 5959108
    Abstract: A crystalline polymorphous terazosine monohydrochloride is obtained by suspending and treating a crystalline addition product of terazosine hydrochloride and methanol in a polar solvent which is an alcohol with 2 to 6 carbon atoms or a ketone with 2 to 6 carbon atoms or a mixture thereof. The thus obtained crystalline polymorphous terazosine hydrochloride is characterized by a reduced hygroscopicity and solvent residue retention capacity.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: September 28, 1999
    Assignee: Cu Chemie Uetikon GmbH
    Inventors: Christophe Bauer, Jean-Marie Grunenwald