On Friday, June 26, 2015 Amgen Inc. filed IPR petitions (IPR2015-01514 and IPR2015-01517) against two Humira (adalimumab) patents owned by AbbVie Inc., in an effort to clear the way for its Humira biosimilar, ABP 501. The patents, 8,916,157 and 8,916,158, are directed to improved formulations of Humira, which Amgen argues are…