Can the certificate of mailing by first class mail procedure be used for PCT applications?
The certificate of mailing by first class mail procedure (37 CFR 1.8) cannot be used for filing papers during the international stage of PCT applications if the date of deposit is to be considered as the filing date. MPEP 1834 clearly states: “It is important to understand that the 37 CFR 1.8 certificate of mailing…
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