after an application for a patent for invention has been submitted and passed the preliminary examination, it will generally be made public 18 months from the date of application (it may be made public in advance if the patent applicant files an application), and the published version of the specification is the disclosure specification of the patent application. Generally speaking, it is the original document submitted by the applicant for patent application.
after publication, the invention patent will enter the substantive examination procedure within 3 years from the date of filing, and the examiner will search at this stage to examine the novelty and creativity of the patent application, and may issue a notice of examination opinions. The applicant needs to reply or modify the opinions according to the contents pointed out in the notice of examination opinions to overcome the defects of originality or other aspects. In this process, the specification of patent application may be revised once or more, and finally it can pass the examination, and the authorized version is the application authorization specification.
Therefore, there may be differences in the contents between the disclosure specification of a patent application and the authorization specification. However, according to Article 33 of the Patent Law, "Article 33
An applicant may modify his patent application documents, but the modification of the patent application documents for inventions and utility models shall not exceed the scope recorded in the original specification and claims, and the modification of the patent application documents for designs shall not exceed the scope indicated by the original pictures or photographs." That is to say, there are restrictions on the modification of the application documents, so compared with the application disclosure specification, there may be great differences in the claims in the authorization specification, but the changes in the specification are generally not too big.