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

Brown, ]William H.

World Patent Information, 1995, vol. 17, issue 4, 225-234

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.

Date: 1995
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