legal ground
Article 3 of the Measures for the Reduction and Exemption of Patent Fees
If the patent applicant or patentee meets one of the following conditions, he may request China National Intellectual Property Administration to reduce or exempt the above fees:
(1) Individuals whose average monthly income in the previous year was less than 3,500 yuan (42,000 yuan per year);
(2) Enterprises with taxable income of less than 300,000 yuan in the previous year;
(3) Institutions, social organizations and non-profit scientific research institutions.
Where two or more individuals or units are the same patent applicant or patentee, they shall abide by the provisions of the preceding paragraph respectively.
Article 4
Where the patent applicant or patentee is an individual or unit, the fee stipulated in Article 2 of these Measures shall be reduced by 85%.
Where two or more individuals or units are the same patent applicant or patentee, the fees specified in Article 2 of these Measures shall be reduced by 70%.