Bristol Myers Sues AstraZeneca Over PD-L1 Cancer Drug Patents
Bristol Myers Squibb Co (US.BMY) claims that AstraZeneca (US.AZN) PD-L1 inhibitor, Imfinzi, infringed on at least eight patents in a newly filed complaint.
The lawsuit in Delaware federal court said that the use of Imfinzi to treat lung and bladder cancer infringes several patents on Bristol's immunotherapy Opdivo. 
From the complaint: AstraZeneca exploits Plaintiffs' inventions and infringes Plaintiffs' intellectual property rights by marketing a later-developed anti-PD-L1 antibody product, Imfinzi (durvalumab), used in methods for treating cancer and for enhancing the immune response.
bristol myers sues astrazeneca over 04179 1727