“Plausibility” in Turkish Patent Law and Its Impact on Invalidation Proceedings

    The grounds for the invalidation of a patent within the scope of Industrial Property Law No. 6769 are listed per the numerus clausus principle. The concept of plausibility – which has been the subject of numerous evaluations, especially by the European Patent Office (“EPO”) and frequently debated in academic circles in recent years – has not yet found a place within the scope of any legal regulation in Turkey. Moreover, there is no consensus on the Turkish wording that meets this concept as a legal term.

    However, the concept of plausibility has started to be argued by the plaintiffs in Turkish invalidity proceedings and has been the subject of important conclusions by the EPO Enlarged Board of Appeal within the scope of application No. G 2/21, so the place of the concept of plausibility in Turkish legal practice must be scrutinized.

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