Research on the affecting factors of the patent maintenance time based on number of patent claim
- 知识产权－已发表论文 
作为专利制度核心的权利要求决定了技术方案的保护深度和广度。作为权利要求关键指标的权利要求数对专利价值,尤其是对专利维持时间的影响程度如何,需要深入研究。基于中国、美国、德国、法国、日本与韩国授权专利数据,采用Logistic模型分析专利权利要求数与维持时间之间的关系发现:除日本和韩国授权专利外,权利要求数对专利维持时间存在正向影响。同时发现,基于专利文献来研究权利要求对维持时间的影响具有一定局限性。Patent claim is the core of the patent,which determines the scope of legal protection of the invention. The number of patent claims may serve as an important characteristic of patent. However,few publications have been available for the relationship between the number of patent claims and the patent maintenance time. This paper explained the Logistic regression model in detail. It used the data of patent granted in 1994 from China,America,Germany,France,Japan and South Korea to analyze the effects of the number of patent claims on the patent maintenance time. The empirical results shows that the number of patent claims could affect the probability of the length of patent maintenance time. We also found that the circumstances are significantly different in Japan and South Korea. It also shows the limitation of research based on patent literature.