What are the provisions for the withdrawal and modification of patent application documents?

The applicant may withdraw his patent application at any time before being granted the patent right. The applicant may modify his patent application documents, but the modification of the application documents for patents for inventions and utility models shall not exceed the scope recorded in the original specifications and claims, and the modification of the application documents for patents for designs shall not exceed the scope shown in the original pictures or photographs. Where the applicant withdraws his patent application, he shall file a declaration with the patent administration department of the State Council, stating the name of the invention-creation, the application number and the application date. The declaration of withdrawing the patent application was made after the patent administrative department of the State Council made preparations for publishing the patent application documents, which should still be published; However, the statement of withdrawing the patent application shall be announced in the patent bulletin published later. Where there are drawings in the specification, but there are no drawings or some drawings are missing, the applicant shall supplement the drawings or declare the cancellation of the drawings within the time limit specified by the patent administration department of the State Council. Where the applicant submits the appended drawings, the date of submitting or mailing the appended drawings to the patent administration department of the State Council shall be the application date; If the appended drawings are cancelled, the applicant for a patent for invention on the original application date may, within three months from the date of receiving the notice that the application for a patent for invention has entered the substantive examination stage issued by the patent administration department of the State Council, take the initiative to propose amendments to the application for a patent for invention. An applicant for a patent for utility model or design may, within 2 months from the date of application, put forward amendments to the application for a patent for utility model or design. Where the applicant modifies the patent application documents after receiving the notice of examination opinions issued by the patent administrative department of the State Council, it shall make the modification according to the requirements of the notice. The patent administration department in the State Council can correct the obvious errors of words and symbols in the patent application documents by itself. Where the administrative department for patent in the State Council modifies it by itself, it shall notify the applicant. In the modified part of the specification or the claims of an application for a patent for invention or utility model, a replacement page shall be submitted in the prescribed format, except for individual text modification or addition or deletion. Where a picture or photograph of an application for a patent for design is modified, a replacement page shall be submitted in accordance with the provisions. The claimant may modify the patent application documents when making a request for reexamination or replying to the notice of reexamination of the Patent Reexamination Board; However, the amendment should be limited to eliminating the defects pointed out in the rejection decision or review notice. The revised patent application documents shall be submitted in duplicate. In the process of examining the request for invalidation, the patentee of a patent for invention or utility model may amend his claim, but shall not expand the scope of protection of the original patent.