When can prior art or Section 301 written statements be filed for a patent?
Prior art or Section 301 written statements can be filed “at any time during the period of enforceability of a patent.” As stated in MPEP 2204: “Submissions may be filed ‘at any time’ under 35 U.S.C. 301. However, this period has been defined by rule (37 CFR 1.501(a)) to be ‘any time during the period…
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