PHARMACEUTICAL NAMES

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What constitutes sufficient “use in commerce” of a drug name to qualify it for trademark protection in the U.S.?  Is it permissible to file a Declaration of Excusable Nonuse when maintaining a registration?   Is there any risk of abandoning the mark in doing so?  Examine the issues in “A Prescription for Proving Use of Trademarks for Drug Names in the U.S.,” originally published in BNA’s Patent, Trademark & Copyright Journal, Vol. 77, No. 1898, Jan. 9, 2009