The legal basis for determining the useful life of the well-known trademarks

The study attempts to determine the useful life of the well-known trademarks to eliminate the legal uncertainty of the well-known trademarks compared to the standard ones. The author carries out a logical analysis of the legislation and Russian state decisions resulted in the fact that despite the absence of restrictions on the duration of registration, the useful life of a well-known trademark cannot be considered as uncertain. It is proposed to examine current legal and economic approaches to determining the useful life of the well-known trademarks to identify the most reliable approach. The minimum useful life of the research subject is analyzed on the basis of the open catalogue of Russian well-known trademarks published by the Russian Federal Service for Intellectual Property (Rospatent). According to the results of the analysis, the average useful life of a well-known trademark in the Russian Federation is at least 325 months.