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Time in Purgatory: Determinants of the Grant Lag for U.S. Patent Applications

Author

Listed:
  • David Popp
  • Ted Juhl
  • Daniel K.N. Johnson

Abstract

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.

Suggested Citation

  • David Popp & Ted Juhl & Daniel K.N. Johnson, 2003. "Time in Purgatory: Determinants of the Grant Lag for U.S. Patent Applications," NBER Working Papers 9518, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:9518
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    References listed on IDEAS

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    1. Koenker, Roger W & Bassett, Gilbert, Jr, 1978. "Regression Quantiles," Econometrica, Econometric Society, vol. 46(1), pages 33-50, January.
    2. Bronwyn H. Hall & Adam B. Jaffe & Manuel Trajtenberg, 2001. "The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools," NBER Working Papers 8498, National Bureau of Economic Research, Inc.
    3. Koenker,Roger, 2005. "Quantile Regression," Cambridge Books, Cambridge University Press, number 9780521845731, August.
    4. Johnson, Daniel K N & Popp, David, 2003. " Forced Out of the Closet: The Impact of the American Inventors Protection Act on the Timing of Patent Disclosure," RAND Journal of Economics, The RAND Corporation, vol. 34(1), pages 96-112, Spring.
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    Citations

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    Cited by:

    1. Liegsalz, Johannes & Wagner, Stefan, 2013. "Patent examination at the State Intellectual Property Office in China," Research Policy, Elsevier, vol. 42(2), pages 552-563.
    2. Harhoff, Dietmar & Wagner, Stefan, 2005. "Modelling the duration of patent examination at the European Patent Office," CEPR Discussion Papers 5283, C.E.P.R. Discussion Papers.
    3. Chellaraj, Gnanaraj & Maskus, Keith E. & Mattoo, Aaditya, 2005. "The contribution of skilled immigration and international graduate students to U.S. innovation," Policy Research Working Paper Series 3588, The World Bank.
    4. Nicolas van Zeebroeck, 2009. "Filing strategies and the increasing duration of patent applications," Working Papers CEB 09-005.RS, ULB -- Universite Libre de Bruxelles.
    5. Yamauchi, Isamu & Nagaoka, Sadao, 2015. "Does the outsourcing of prior art search increase the efficiency of patent examination? Evidence from Japan," Research Policy, Elsevier, vol. 44(8), pages 1601-1614.
    6. Jeffrey Clemens, 2012. "The Effect of U.S. Health Insurance Expansions on Medical Innovation," Discussion Papers 11-016, Stanford Institute for Economic Policy Research.
    7. Nicolas van Zeebroeck, 2011. "Long Live Patents: the Increasing Life Expectancy of Patent Applications and its Determinants," Review of Economics and Institutions, Università di Perugia, vol. 2(3).
    8. Yamauchi, Isamu & Nagaoka, Sadao, 2013. "Does the outsourcing of prior art search increase the efficiency of patent examination?," IIR Working Paper 13-12, Institute of Innovation Research, Hitotsubashi University.
    9. Nicolas van Zeebroeck, 2009. "From patent renewals to applications survival: do portfolio management strategies play a role in patent length?," Working Papers CEB 09-028.RS, ULB -- Universite Libre de Bruxelles.
    10. Kessler, Jeff & Sperling, Daniel, 2016. "Tracking U.S. biofuel innovation through patents," Energy Policy, Elsevier, vol. 98(C), pages 97-107.

    More about this item

    JEL classification:

    • O3 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights
    • O32 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Management of Technological Innovation and R&D

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