How are Markush claims examined for patentability?

Markush claims are examined for patentability like other claims, but with some specific considerations: The examiner first determines if the Markush grouping is proper. If improper, a rejection based on an improper Markush grouping is made. The claim is then examined for all other conditions of patentability (e.g., 35 U.S.C. 101, 102, 103, 112, and…

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