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Expiration of Patent

Smith Hopen Intellectual Property Term Glossary Definition for Expiration of Patent
Termination of the enforceability period of a patent at the end of the patent term or for failure to pay a maintenance fee. Patent terms prior to 1995 were 17 years from the date that the patent application was issued. However, current law measures the term of a patent 20 years from the date that the patent application is filed. Design patents last 14 years.


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