MPEP 1920
Citation of Prior Art Under 37 CFR 1.501(a)

This is the Ninth Edition of the MPEP, Revision 08.2017, Last Revised in Januay 2018

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1920    Citation of Prior Art Under 37 CFR 1.501(a) [R-08.2012]

37 CFR 1.501(a) permits any person at any time during the period of enforceability of a patent to cite to the Office, in writing, prior art consisting of patent and printed publications which that person states to be pertinent and applicable to the patent and believes to have a bearing on the patentability of any claim(s) of the patent. See MPEP § 2202 - § 22.8.