Patent Renewal Rates under Different Renewal Period Schemes

by Bharath Venkat In order to keep a US patent in force, the US Patent & Trademark Office requires that patent owners make maintenance fees at years 3.5, 7.5 and 11.5 after grant. This is in addition to filing, search, examination and post-filing fees. Other patent issuing authorities use different rules. For the European Patent Office (EPO), maintenance payments must

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Why do We Pay Maintenance Fees?

Patent maintenance fees continue to increase. However, once the patent has issued, the USPTO does not provide any ongoing services to the patent holders. Therefore patent holders are correct in wondering why they must pay patent maintenance fees and why the fees are increasing. The requirement of maintenance fees has both economic and public policy reasons. First, maintenance fee revenue is used

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