Maxygen, Inc. (MAXY) Announces Final Rejection of All Claims of Amgen (AMGN) '804 Patent in Inter Partes Reexamination Proceeding  
10/11/2011 10:20:26 AM

REDWOOD CITY, Calif.--(BUSINESS WIRE)--Maxygen, Inc. (Nasdaq:MAXY), a biotechnology company, today announced that the United States Patent and Trademark Office (PTO) has issued a Right of Appeal Notice in the inter partes reexamination proceeding for Amgen’s U.S. Pat. No. 7,381,804 (the ‘804 patent) that includes a final rejection of all claims in the ‘804 patent. Amgen’s ‘804 patent includes certain claims to mutated granulocyte colony stimulating factor (G-CSF) molecules that potentially cover Maxygen’s MAXY-G34 product candidate, a next-generation, pegylated G-CSF. Maxygen submitted the request to the PTO for an inter partes reexamination of the Amgen patent in 2009. Amgen has the right to appeal the decision to the PTO’s Board of Patent Appeals and Interferences.