Time in Purgatory: Determinants of the Grant Lag for U.S. Patent Applications
The impacts of two recent changes in US patent policy depend on the length of time it takes for an invention to go through the examination process. Concerns over the distributional effects of these changes were expressed during policy debates. We use data on U.S. patent applications and grants to determine the factors influencing the length of the patent examination process. We augment this analysis with interviews of patent examiners, leading to a better understanding of the examination process. Our analysis finds that differences across technology are most important. Inventor characteristics have statistically significant effects, but the magnitudes are small.
|Date of creation:||Mar 2003|
|Publication status:||published as Popp, David, Ted Juhl and Daniel K.N. Johnson. “Time In Purgatory: Determinants of the Grant Lag for U.S. Patent Applications." The B.E. Journal of Economic Analysis & Policy, Vol. 4 (2004) Issue 1|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
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