5.126. How can obvious mistakes in the claims be rectified? The procedure for rectification of obvious mistakes is explained in paragraphs 11.033 to 11.044. The omission of an entire sheet of the claims cannot be rectified without affecting the international filing date (see paragraphs 6.025 and 6.026). It is recommended that a request for the rectification of obvious mistakes in the claims be made only if the mistake is liable to affect the international search; otherwise, the rectification should be made by amending the claims (see paragraph 5.127).
Source: http://www.wipo.int/pct/en/appguide/text.jsp?page=ip05.html
Date retrieved: 02 November 2015