Welcome to the new version of the Patents Manual. Please note there are changes to the numbering and sequence of the chapters and pages in the manual. You are encouraged to take the time to explore and familiarise yourself with this new structure. Extensions of Time to Respond to Opinions

Date Published

Also in this Chapter:

Key Legislation:

Regulations under the PCT:

  • Rule 66.4bis Consideration of Amendments, Arguments and Rectifications of Obvious Mistakes

Related Chapters:

No consequences flow from the failure by an applicant to respond to an IPEO within the time set to provide such a response. Any response from the applicant is to be taken into account in establishing the IPRPII providing the circumstances justifying the invoking of Rule 66.4bis do not exist. No request for an extension of time is required to be filed by the applicant when responding to an IPEO outside the time set to do so in the opinion, but any such response must be made no later than 1 month before the final date for establishment of the IPRPII. If no response has been made to an IPEO by this time, the case file will be forwarded to the examiner to immediately establish the IPRPII. No extension of time beyond this point will be granted. See also First IPE Action.

If a response to an IPEO is filed more than 1 month but less than 3 months before the expiration of the final date for establishing the IPRPII, then under normal circumstances no further IPEO is to be issued, and the IPRPII is to be established forthwith.

Note: Any request to extend the time to respond to an ISO will not be granted.

Amended Reasons

Amended Reason Date Amended

Published for testing

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