How should a Markush group be properly formatted in a patent claim?
A Markush group in a patent claim should be formatted as a closed group of alternatives. According to the MPEP 2173.05(h): “A Markush grouping is a closed group of alternatives, i.e., the selection is made from a group ‘consisting of’ (rather than ‘comprising’ or ‘including’) the alternative members.” The MPEP also notes that the specific…
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