P.O. Box 1630, 35006 Marburg, Germany; formerly a subsidiary of Hoechst AG; Chiron Corp. acquired 49% of Behringwerke AG from Hoechst Marion Roussel (Hoechst AG) in July 1996, forming Chiron Behring which operated as a joint venture of Chiron and Hoechst Marion Roussel; Chiron purchased the remaining 51% in April 1998; Novartis AG acquired Chiron in late 2005.
