The patent expiration dates are not in correspondence with the dates that were published for Genentech's biologics: Product Latest-to-expire product-specific U.S. Patent(s) Year of expiration Avastin 6,884,879 2017 7,169,901 2019 Rituxan 5,677,180 2014 5,736,137 2015 Herceptin 6,339,142 2019 6,407,213 2019 7,074,404 2019 Lucentis 6,884,879 2017 7,169,901 2019 Xolair 6,329,509 2018 (see http://www.gene.com/gene/ir/downloadDoc.do?id=3841 Page 10). The biggest discrepancy is in the case of Herceptin: 2019 instead of 2015.