What is the significance of the two-year period in reissue applications?

The two-year period from the grant of the original patent is significant in reissue applications for several reasons, as outlined in MPEP 1403: Broadening Reissues: According to 35 U.S.C. 251(d), broadening reissue applications must be filed within this two-year period. Presumption of Diligence: The MPEP states, “Where any broadening reissue application is filed within two…

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