Merck

In July 2005, we entered into a worldwide exclusive research, development and commercialization license agreement with Merck & Co. (Merck), Inc. for cancer vaccines targeting telomerase by methods other than dendritic cell delivery. In addition, Merck acquired an exclusive option to negotiate a separate agreement for our autologous dendritic cell-based telomerase vaccine. On December 31, 2007, Merck's option to our dendritic cell-based vaccine technology expired and Geron retains all product rights for all indications using both autologous and hESC-derived dendritic cells. In December 2007, Merck filed an IND to initiate a clinical trial for their cancer vaccine candidate that targets telomerase.