WANG Yufang, YAN Chungen, XIAO Zhuohao, LUO Xiaoning

(Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Abstract: Based on the IncoPat Patent Information Retrieval and Analysis System, 13,254 patent applications on ceramic membranes published by the Patent Office of China National Intellectual Property Administration from 1985 to 2019 were analyzed from the perspectives of application trend, geographical distribution, application type, legal status, principal applicant and technical filed. It is demonstrated that China's ceramic membrane technology is developed rapidly and the number applications is increased very fast, while the utility models and invalid patents account for a large proportion, suggesting that the patent quality and management level need to be improved. Japan, the United States and other countries have made strong efforts in applying patents in China, with a large number of patent applications. Domestic applications are mainly concentrated in provinces and cities with more developed economy, universities and research institutes or ceramic membrane enterprises. Domestic principal applicants are universities and research institutes, while the overseas ones are enterprises, especially in Japan. It is strongly suggested to perfect and implement the patent strategy on ceramic membrane, deepen the cooperation between industries and universities, research and application, strengthen the application research on ceramic membranes in the fields of biomedicine, energy conservation and environmental protection, and develop ceramic membrane products conducive to industrialization and commercialization.
Key words: ceramic; membrane; patent information; information analysis