Legal analysis: the extension of patent application is the official fee of the patent office, which can be given preferential treatment according to the applicant's requirements. The standard official fee for applying for an invention patent is 3450 (including the application fee of 950 and the substantive examination fee of 2500), which can be reduced to 1070 if it meets the conditions of company fee reduction and exemption, and 560 if it meets the conditions of personal fee reduction and exemption; The standard official fee for an application for a patent for utility model or design is 500, which can be reduced to 150 if it meets the conditions of company fee reduction and exemption, and 75 if it meets the conditions of personal fee reduction and exemption.
Legal basis: Article 98 of the Detailed Rules for the Implementation of the Patent Law of People's Republic of China (PRC). Where it is difficult for the applicant or patentee to pay the fees specified in these Detailed Rules, he may request the the State Council Patent Administration Department to reduce or postpone the payment in accordance with the regulations. Measures for reducing or postponing payment shall be formulated by the patent administrative department of the State Council in consultation with the finance department of the State Council and the price administrative department of the State Council.