Piper Jaffray analyst Richard Purkiss raised his price target for AbbVie (ABBV) to $100 after pushing out a U.S. biosimilar entry for Humira by two years. The recent denials by the Patent Trial and Appeal Board of all four of Coherus Bioscience's (CHRS) inter partes review petitions reinforce the patentability of Humira's formulation, Purkiss tells investors in a research note. The analyst pushed out his view of the likely timing of the first U.S. biosimilar launch versus Humira to the second half of 2022 from the second half of 2020. He estimates Humira will still account for 58% of AbbVie's total revenue in 2020. The analyst reiterates an Overweight rating on the shares.