Abstract
The development status and trend of the patents related to sewage treatment technology in Dalian, China in the past decade may affect the future environmental protection industry development. The status quo of patent applications related to wastewater treatment technology was analyzed from the perspectives of application volume, disclosure volume, application organization, type composition of invention and utility model patent products and legal status. The results indicated that the total number of filed patents were 894, and the number of issued patents were 914 in recent ten years, showing an increasing trend for sewage treatment technology in Dalian, China. However, there were distinct differences between the application agencies of invention patents and utility model patents. Most of the invention patents came from universities, with 264 in the top five, and most of the utility model patents came from enterprises, with 134 in the top five. Among the product types, the highest number of patent applications was water, wastewater, or sludge treatment technology, a total of 761. At this point, the two patent directions had the same trend. In the state of law, although the number of applications and disclosures was 470, which was more than 416 actually authorized, it was not difficult to find that sewage treatment industry in Dalian, China was in an increasingly developing stage and the patents actually obtained had higher quality assurance. In conclusion, this essay from the perspective of patent application made a simple explanation the future development of sewage treatment industry and the problems existing in the practical application of sewage treatment technology. Finally, from the perspective of patent application, the paper analyzed the future development of sewage treatment industry and the problems existing in the practical application of sewage treatment technology.
Highlights
A total of 894 filed patents of sewage treatment technology were published by The State Intellectual Property Office in Dalian from 2009 to 2019, and the development trend of the annual filed patents and annual issued patents were shown in Fig.[1]
The number of Dalian sewage treatment technology invention patent applications for these five institutions is 264, accounting for 38.22% of the total.In particular, Dalian University of Technology, which ranks first, has a total of 174 applications, accounting for 24.27%. It is the main institution for patent applications for sewage treatment technology inventions in Dalian
Dalian Dakai sewage treatment Company Limited, which ranks first, has a total of 42 applications, accounting for 9.57%. It is the main organization for utility model patent applications of sewage treatment technology in Dalian
Summary
A total of 894 filed patents of sewage treatment technology were published by The State Intellectual Property Office in Dalian from 2009 to 2019, and the development trend of the annual filed patents and annual issued patents were shown in Fig.[1]. From 2009 to 2012, there were 163 filed patents for sewage treatment technology in Dalian,and from 2013 to 2019, there were 731.It can be seen that the overall filed patents have shown an increasing trend since 2013,and a new high in 2013.It has been a slight increased in recent years
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