For National Phase Filing of a PCT Application in India, the following information/documents are required:
The Specification including drawing figures as published in the PCT Gazette; [Verified English translation of international application, if not in English];
International Search Report;
International Preliminary Examination Report (if India is elected for using the IPE results);
The PCT Request;
Form PCT/IB/304(Notification Concerning Submission or Transmittal of Priority Document);
Certified Copies of the Priority Documents, if available (can be filed later);
Particulars of amendments made to the specification/claims during the PCT International Phase; [Verified English translation of amendments filed during the international phase];
Details of Priority Application(s);
Details of corresponding foreign applications filed; and
Power of Authorisation (can be filed later).
Please note: Indian Patent Office is flexible once national phase application is remitted in time. In other words, if the national fee is paid in time with complete specification and drawings, a filing number will be allotted by the Patent Office. Thereafter, the applicant is allowed to make any additions or amendments in conformity with the international application and additional documents can be submitted.