Patents Assigned to Ciba Specialty Chemicals Corpation
  • Crystalline forms of venlafaxine hydrochloride
    Patent number: 6906087
    Abstract: Crystalline forms of Venlafaxine hydrochloride were found, referred to hereinafter as polymorphic Forms A, B and D. Furthermore, the present invention is directed to processes for the preparation of these crystalline forms and pharmaceutical compositions comprising the crystalline forms.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: June 14, 2005
    Assignee: Ciba Specialty Chemicals Corpation
    Inventors: Paul Adriaan Van Der Schaaf, Claudia Marcolli, Martin Szelagiewicz, Beat Freiermuth
  • Curable resin compositions
    Patent number: 6077886
    Abstract: A curable epoxy resin composition comprising (A) an epoxy resin, (B) a thixotropic agent in an amount sufficient to induce thixotropic properties, and a hardener comprising (C) at least one polyethyleneimine and (D) at least one other amine having at least 2 amino hydrogen atoms, the combined amounts of (C) and (D) being sufficient to effect cure of the epoxy resin.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: June 20, 2000
    Assignee: Ciba Specialty Chemicals Corpation
    Inventors: Barry James Hayes, Kevin Brian Hatton