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Trends in patent renewals at the United States patent and trademark office

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  • Brown, ]William H.

Abstract

In many countries, the owner of a patent is required to make periodic renewal fee payments in order to maintain legal entitlement to the patented technology. Failure to make a renewal fee payment can result in the expiration of the patent prior to its statutory term. This paper presents the results of an analysis of renewal fee payments on patents issued by the United States Patent and Trademark Office (PTO) since 1982. Results show higher rates of renewal are associated with patents that have corporate owners, are of Japanese origin, and emphasize chemical and electrical classes of technology. A decline in renewal activity since 1990 is evident across most categories of patent ownership and country of patent origin.

Suggested Citation

  • Brown, ]William H., 1995. "Trends in patent renewals at the United States patent and trademark office," World Patent Information, Elsevier, vol. 17(4), pages 225-234, December.
    • Handle: RePEc:eee:worpat:v:17:y:1995:i:4:p:225-234
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    Cited by:

    1. Kortum, Samuel & Lerner, Josh, 1998. "Stronger protection or technological revolution: what is behind the recent surge in patenting?," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 48(1), pages 247-304, June.
    2. Yong-Gil Lee, 2008. "Patent licensability and life: A study of U.S. patents registered by South Korean public research institutes," Scientometrics, Springer;Akadémiai Kiadó, vol. 75(3), pages 463-471, June.
    3. Kortum, Samuel & Lerner, Josh, 1999. "What is behind the recent surge in patenting?1," Research Policy, Elsevier, vol. 28(1), pages 1-22, January.

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