A patent claims a chemical compound. The specification discloses only one utility — treating headaches — but an examiner argues that utility is not credible without clinical data. This rejection is under:
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A
35 U.S.C. § 101 for lack of patentable subject matter
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B
35 U.S.C. § 112 for lack of written description
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C
35 U.S.C. § 101 for lack of utility
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D
35 U.S.C. § 103 for obviousness