PTAB Reaffirms Written Description Threshold When Claiming a Genus

Attorney: Sara Pistilli, PharmD.
May 21, 2024

On May 17, 2024, the Patent Trial and Appeal Board (PTAB) affirmed a rejection of a claim directed to a purification method using single-domain antigen-binding proteins that bind mammalian IgG as lacking adequate written description (Appeal 2023-000567). The claim at issue in U.S. Application No. 16/282,082 (the ‘082 Application) recites:<... Read more

Federal Circuit Reiterates What Constitutes A Motivation to Combine, A Reasonable Expectation of Success, and Unexpected Results in New Chemical Compounds

Attorney: Sara Pistilli, PharmD.
August 30, 2023

In Sun Pharmaceutical Industries, Inc. v. Incyte Corporation, on August 22, 2023, the Federal Circuit affirmed a Final Written Decision of the Patent and Trial Appeal Board (the Board) of an inter partes review (IPR) asserting the claims of U.S. Patent No. 9,249,149 (the ’149 patent) as obvious under 35 U.S.C. § 103. The central argument was whether Sun’s “octo-deuterated” ruxolitinib analog (CTP-543) and “tetra-deuterated” ruxolitinib analogs, arising from claim 7 of the ’149 patent, were obvious in light of the prior art references presented by Incyte (Rodgers, Shilling, and the Concert Backgrounder).

Claim 7 recited:

The compound of claim 1, in which the compound is selected from the group consisting of:




or a pharmaceutically acceptable salt of any of the foregoing.<... Read more