At any time since the announcement of the grant of patent right.
2, the period of proof in the procedure of invalidation
The applicant for invalidation shall supplement the reasons and submit new evidence within 1 month from the date of filing the request for invalidation, otherwise it will not be considered.
3, the time limit for the request for invalidation fee
The claimant for invalidation shall pay the request fee for invalidation within 0 months from the date of filing the request for invalidation.
4. The power of attorney in the invalidation procedure does not meet the requirements and needs to be corrected.
Where the claimant entrusts a patent agency but fails to submit a power of attorney to the Patent Reexamination Board or fails to designate an authorized agency, the claimant shall make corrections within 7 days from the date of receiving the notice.
5, the "notice of acceptance of the request for invalidation" reply period
The patentee shall reply within 0 months from the date of receiving the notification of acceptance of the request for invalidation.