Patent Cooperation Treaty (PCT)

Article 19
Amendment of the Claims Before the International Bureau

(1)  The applicant shall, after having received the international search report, be entitled to one opportunity to amend the claims of the international application by filing amendments with the International Bureau within the prescribed time limit. He may, at the same time, file a brief statement, as provided in the Regulations, explaining the amendments and indicating any impact that such amendments might have on the description and the drawings.

(2)  The amendments shall not go beyond the disclosure in the international application as filed.

(3)  If the national law of any designated State permits amendments to go beyond the said disclosure, failure to comply with paragraph (2) shall have no consequence in that State.