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Opposition Period and Extensions of Time to Oppose

Please note that anyone may oppose within the original 30--day opposition period, but only those who obtain extensions of time to oppose may file during an extended opposition period.   That is, you may not "piggyback" onto someone else's extension--- you must always first file within the original period.

United States Patent and Trademark Office
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Last Modified: 11/5/2013 2:21:44 PM