Assessment of Inventive Step of Polymorphic Drug Patent from the Perspective of Patent Reexamination and Invalidation
By combing through several review processes involving patent reexamination and invalidation,this article discussed how to choose the closest prior art and the determination of technical effect,and in combination with typical cases,it is expected to provide feasible suggestions for patent examination of crystal forms of drug derivatives,thereby improving patent examination quality and stability after authorization.
drug derivativespolymorphic druginventive steppatent examination
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