MPEP 901.01
Canceled Matter in U.S. Patent Files

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

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901.01    Canceled Matter in U.S. Patent Files [R-08.2017]

Canceled matter in the application file of a U.S. patent or U.S. application publication is not a proper reference as of the filing date under 35 U.S.C. 102(a)(2) or pre-AIA 35 U.S.C. 102(e). See Ex parte Stalego, 154 USPQ 52, 53 (Bd. App. 1966). However, matter canceled from the application file wrapper of a U.S. patent or U.S. application publication may be used as prior art as of the patent or publication date, respectively, in that it then constitutes prior public knowledge or prior public availability under 35 U.S.C. 102(a)(1) or pre-AIA 35 U.S.C. 102(a). See, e.g., In re Lund, 376 F.2d 982, 153 USPQ 625 (CCPA 1967). See also MPEP § 2127 and § 2136.02.