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                (1)新產品用途發明的創造性 對于新的化學產品,如果該用途不能從結構或者組成相似的已知產品預見到,可認為這種新產品的用途發明有創造性。 (2)已知產品用途發明的創造性 對于已知產品的用途發明,如果該新用途不能從產品本身的結構、組成、分子量、已知的物理化學性質以及該產品的現有用途顯而易見地得出或者預見到,而是利用了產品新發現的性質,并且產生了預料不到的技術效果,可認為這種已知產品的用途發明有創造性。
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