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s delegation to establish appropriate procedures to govern amendment practice. To Case: 15-1177 Document:

125 Page:

8 Filed: 10/26/2016

2 the extent section § 316(e) introduces an ambiguity into the statutory scheme, that ambiguity must be resolved in the USPTO'

s favor under Chevron. 2. When the petitioner does not challenge the patentability of a proposed amended claim, or the Board thinks the challenge is inadequate, may the Board sua sponte raise patentability challenges to such a claim? If so, where would the burden of persuasion, or a burden of productio........