Vivalis Announces the Grant of a Patent in Europe in Its Core Field of Avian Embryonic Stem Cells Thus Strengthening Its Intellectual Property Portfolio

NANTES, FRANCE--(Marketwire - December 05, 2007) - VIVALIS announced today that the European Patent Office (E.P.O) has granted a new European patent to VIVALIS under N degreesEP1446004. This patent protects, among others, a process of obtaining avian embryonic stem cells (ES) modified through homologous recombination to express recombinant proteins of interest.