情报杂志Issue(6)：33-37,47,6.DOI:10.3969/j.issn.1002-1965.2015.06.007
不同国家授权的化学冶金技术领域专利维持时间实证研究
Empirical Analysis of the Maintenance Time of Patents Granted by Different Countries in the Technological Field of Chemical Metallurgy
摘要
Abstract
The technical field is an important norm for the patent classification, and each technical field should have its own characteris-tics. The values of patents could be reflected by the situations of the maintenance time of patents granted by different countries in the tech-nological field of chemical metallurgy. By retrieving the information of patents granted by America, Japan, Korea, Germany, French and China in the technical field of chemical metallurgy, conclusions based on the related software analysis results can be drawn like the follow-ing: the average maintenance time of patents of this technological field is consistent with the average maintenance time of all technical fields in each country;the terminated patents granted in America are mostly distributed in the last stage, and the terminated patents granted in Japan, Germany, France, and Korea are mostly distributed in the middle and last stages, while most of the patents granted in China are terminated in the early stage.关键词
化学冶金/技术领域/专利维持时间Key words
chemical metallurgy/technical field/maintenance time of patent分类
社会科学引用本文复制引用
乔永忠,章燕..不同国家授权的化学冶金技术领域专利维持时间实证研究[J].情报杂志,2015,(6):33-37,47,6.基金项目
国家自然科学基金面上项目“专利维持机理及维持规律实证研究”(编号:71373221)。 （编号:71373221）
