Can the patent application documents be amended after submission?

After submitting the patent application documents to the Patent Office, the applicant may modify the patent application documents at the patent application stage. The general principle of patent modification of patent documents is that the modification shall not exceed the scope, that is, the modification of application documents for patents for inventions and utility models shall not exceed the scope recorded in the original specification and claims; The modification of the application documents for a patent for design shall not exceed the scope shown in the original picture or photograph. Where the applicant proposes to amend the patent document voluntarily, the time for proposing the amendment shall meet the statutory requirements, that is, the applicant for a patent for invention may propose to amend the application for a patent for invention within 3 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; 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 passively modifies the patent application documents, that is, 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 modify the defects pointed out in the notice. Or when the claimant makes a request for reexamination or responds to the notice of reexamination of the Patent Reexamination Board, the amendment shall be limited to eliminating the defects pointed out in the rejection decision or the notice of reexamination. Seven situations in which a patent cannot be amended: (1) Write some technical features that cannot be clearly identified directly from the original specification (including drawings) and/or the claims into the claims and/or specifications; (2) Added information that cannot be directly and explicitly deduced from the original specification (including the attached drawings) and/or the claims, nor can it be directly obtained through the common sense of technicians in this field, so as to make the disclosed invention clear or the claims complete; (3) The added content is the technical characteristics of the size parameters obtained by measuring the attached drawings; (four) the introduction of additional ingredients not mentioned in the original application documents, resulting in special effects that the original application did not have; (5) Supplementing the beneficial effects that the technicians in this field can't get directly from the original application; (6) add experimental data to illustrate the beneficial effects of the invention, and/or add examples and examples to illustrate that the invention can be implemented within the scope of the protection of the claims (but these supplementary information can be put into the application documents for the examiner to refer to when examining novelty, creativity or practicality); (7) Supplementary drawings not mentioned in the original manual are generally not allowed; If the drawings of background technology are supplemented, or the drawings of known technology in the original drawings are replaced by the drawings closest to the existing technology, it should be allowed.