Abstract
In order to grasp the overall status of sulfur autotrophic denitrification related patents, and better carry out sulfur autotrophic denitrification related research and intellectual property protection, based on the SooPAT Chinese patent search engine and Baiteng.com platform, from the first patent application year to the search deadline was to analyze the number, legal status, technical field distribution, and patent value of the sulfur autotrophic denitrification patents filed in China. The results showed that the number of patents filed each year had increased rapidly since 2012. The number of patents filed in 2019 was 10 times the number of patent applications from 2001 to 2011, and the patents granted were mainly concentrated in the field of sewage (waste) water treatment, accounting for 83.64% of the total number of patents. The overall patent value was in the middle and lower level, and there were no high-value patents.
Highlights
The removal methods of nitrate mainly included physical chemistry, chemistry and biology
The technical value was mainly mined from the description information and legal events of the patent application, the economic value mainly indicated the expected benefits that the patented technology might bring in the process of commercialization, industrialization and marketization, and the legal value was mainly evaluated from the perspective of the stability of patent right
Among the 55 patents, the maximum value of patent value was 66, the minimum value 46, the mean value and the median value both 53.0, and the dispersion degree is 0.09, indicating that the overall patent value of sulfur autotrophic denitrification was below the medium level, and there were no high-value patents, and the patent value is relatively concentrated
Summary
The removal methods of nitrate mainly included physical chemistry, chemistry and biology. According to the different carbon sources used by bacteria, biological denitrification could be divided into heterotrophic denitrification and autotrophic denitrification The latter had the characteristics of low cost (no need to add organic matter), low energy, low sludge yield and high efficiency[2], especially in the field of low C/N ratio wastewater treatment[3], which had obvious economic advantages and broad application prospects. The SooPAT patent search engine is used to search the patent status of sulfur autotrophic denitrification from the first relevant patent application year to the search deadline, and the patent value is inquired in Baiteng network On this basis, the number, legal status, application year, process coupling, sulfate purification and patent value degree of the patents are analyzed, so as to provide reference for the research and intellectual property protection of sulfur autotrophic denitrification
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