Juno Therapeutics, Inc v. Kite Pharma, Inc., No. 20-1758 (Fed. Cir. 2021)Annotate this Case
T cells, white blood cells that contribute to the immune response, have naturally occurring receptors on their surfaces that facilitate their attack on target cells (such as cancer cells) by recognizing and binding an antigen, i.e., a structure on a target cell’s surface. Chimeric antigen receptor (CAR) T-cell therapy involves isolating a patient’s T cells; reprogramming those T cells to produce a specific, targeted receptor (a CAR) on each T cell’s surface; and infusing the patient with the reprogrammed cells. Juno’s patent relates to a nucleic acid polymer encoding a three-part CAR for a T cell. It claims priority to a provisional application filed in 2002, at “the birth of the CART field.” Kite’s YESCARTA® is a “therapy in which a patient’s T cells are engineered to express a [CAR] to target the antigen CD19, a protein expressed on the cell surface of B-cell lymphomas and leukemias, and redirect the T cells to kill cancer cells.”
Juno sued, alleging infringement. The district court held that the claims were not invalid for lack of written description or enablement, the patent’s certificate of correction was not invalid, and Juno was entitled to $1,200,322,551.50 in damages. The Federal Circuit reversed. No reasonable jury could find the patent’s written description sufficiently demonstrates that the inventors possessed the full scope of the claimed invention.