专利权人和无效宣告请求人应当在指定期限内答复专利复审委员会发出的转送文件通知书或者无效宣告请求审查通知书；

• The patentee and the person making request for invalidation shall, within the specified time limit, make responses to the notification concerning transmitted documents or the notification concerning the examination of the request for invalidation sent by the Patent Reexamination Board.