(1) Examination of obvious substantive defects.
The obvious substantive defects that should be examined include: whether the subject matter of the application for a patent for invention obviously does not belong to the invention specified in the Patent Law and its detailed rules for implementation, whether the subject matter of the application for a patent for invention obviously violates the national laws, social ethics or harms the public interest, whether the content of the application for a patent for invention obviously falls within the scope of not granting a patent right, and whether the application obviously does not conform to the provisions on the singularity of invention. In the preliminary examination, when the examiner requests the applicant to modify the application for the purpose of publishing the application, whether the modification proposed by the applicant is obviously beyond the scope recorded in the original specification and claim, and whether the writing of the specification and claim is obviously inconsistent with the relevant provisions.
In principle, the preliminary examination does not examine substantive issues. The above-mentioned substantive defects should be limited to "obvious" and affect publication.
(two) review the subject of application and agency matters.
(3) Examining whether the application documents submitted by the applicant and other documents related to the patent application meet the formal requirements stipulated in the Patent Law and its detailed rules for implementation.
(4) Examination of some special patent applications.
It belongs to the special examination of divisional application or application involving biological materials that need to be preserved.
(5) Consideration of other issues.
For example, an application for a patent for invention involving national defense secrets accepted by China National Intellectual Property Administration should be handed over to the relevant competent department for examination.