Long Live Patents: the Increasing Life Expectancy of Patent Applications and its Determinants
Nicolas van Zeebroeck ()
Review of Economics and Institutions, 2011, vol. 2, issue 3
Relying on a comprehensive dataset including detailed information on all patent applications filed to the EPO from 1980 to 2000 and on the renewal of those of them that were granted, this paper presents the first survival time analysis of the determinants of patent length. The results are twofold: first, they clearly establish that the life expectancy of patent rights has significantly increased over the past decades despite a small decline in the average grant rate. Second, they show that some filing strategies very strongly influence the overall length of patents, possibly due to induced delays in the examination process. This suggests that such strategies may result in higher and longer lasting legal uncertainty on the markets, with unknown consequences on the dynamic efficiency of the patent system.
Keywords: patent length; patent value; renewals; granting process; survival time analysis (search for similar items in EconPapers)
JEL-codes: O31 O34 O50 (search for similar items in EconPapers)
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3) Track citations by RSS feed
Downloads: (external link)
Requires registration. Users must be registered and log in to access full text
Working Paper: Long live patents: the increasing life expectancy of patent applications and its determinants (2011)
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
Persistent link: https://EconPapers.repec.org/RePEc:pia:review:v:2:y:2011:i:3:n:5
Access Statistics for this article
Review of Economics and Institutions is currently edited by Carlo Andrea Bollino
More articles in Review of Economics and Institutions from Università di Perugia Contact information at EDIRC.
Bibliographic data for series maintained by Ubaldo Pizzoli ().