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§ 307 System of Numbering International Applications - ADMINISTRATIVE INSTRUCTIONS UNDER THE PCT
§ 307 System of Numbering International Applications
(a) Papers purporting to be an international application under Rule 20.1(a) shall be marked with the international application number, consisting of the letters "PCT," a slant, the two-letter code referred to in Section 115, indicating the receiving Office, a four-digit indication of the year in which such papers were first received, a slant and a six-digit number, allotted in sequential order corresponding to the order in which the international applications are received (e.g., "PCT/SE2004/000001"). Where the International Bureau acts as receiving Office, the two-letter code "IB" shall be used.
(b) If a negative determination is made under Rule 20.7 or a declaration is made under Article 14 (4), the letters "PCT" shall be deleted by the receiving Office from the indication of the international application number on any papers marked previously with that number, and the said number shall be used without such letters in any future correspondence relating to the purported international application.
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