An Empirical Study on the Patent Quality of Vaccine Technology from China, the United States and Japan - Based on the Comparison of Legal Status, Maintenance Time and Citation Index of Vaccine Patents Granted in China

摘要

Studying the patents granted in China in the field of vaccine technology, this paper conducts an empirical analysis on legal status, maintenance time and citation index of the vaccine patents from China, the United States and Japan. Based on a series of data, the paper draws the conclusion that: the vaccine patents from the United States are more stable and have higher technology maturity; the vaccine patents from Japan update with a quicker speed, and the patentees from Japan would like to take a short-duration patent strategy; as for vaccine patents from China, in general, the technology maturity, the update speed and the patent quality are inferior to those of the vaccine patents from the United States and Japan. Additionally, the Patent Citation Index of vaccine patents granted in China is quite low.