| 来源类型 | Working Paper |
| 规范类型 | 报告 |
| DOI | 10.3386/w13153 |
| 来源ID | Working Paper 13153 |
| Pioneers, Submariners, or Thicket-builders: Which Firms Use Continuations in Patenting? | |
| Deepak Hegde; David C. Mowery; Stuart Graham | |
| 发表日期 | 2007-06-07 |
| 出版年 | 2007 |
| 语种 | 英语 |
| 摘要 | The continuations procedure within the U.S. patent system has been criticized for enabling firms to manipulate the patent review process for strategic purposes. Changes during the 1990s in patent procedures affected the incentives of applicants to exploit the continuations process, and additional reforms in continuations currently are being considered. Nonetheless, little is known about applicants' use of the three major types of continuations -- the Continuation Application (CAP), the Continuations-In-Part (CIP), and Divisions -- to alter the term and scope of patents. This paper analyzes patents issued from the three types of continuations to U.S. firms during 1981 - 2004 (with priority years 1981 - 2000), and links their frequency to the characteristics of patents, assignees and industries. We find that CIPs are disproportionately filed by R&D-intensive, small firms that patent heavily, and are more common in chemical and biological technologies. Patents resulting from CIP filings contain more claims and backward citations per patent on average, and cover relatively "valuable" inventions. In contrast, CAPs cover less valuable patents from large, capital-intensive firms that patent intensively, particularly in computer and semiconductor patents. We also analyze the effects of the 1995 change in patent term on continuation applications and find that the Act reduced the use of continuations overall, while shifting the output of CAPs toward "less important" patents. |
| 主题 | Development and Growth ; Innovation and R& ; D |
| URL | https://www.nber.org/papers/w13153 |
| 来源智库 | National Bureau of Economic Research (United States) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/570822 |
| 推荐引用方式 GB/T 7714 | Deepak Hegde,David C. Mowery,Stuart Graham. Pioneers, Submariners, or Thicket-builders: Which Firms Use Continuations in Patenting?. 2007. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| w13153.pdf（272KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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