Questions & answers
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Questions & answers
How long does a patent last?
A utility patent generally lasts 20 years from its earliest U.S. nonprovisional filing date, with maintenance fees. A design patent from an application filed on or after May 13, 2015 lasts 15 years from grant.
What is a provisional patent application?
A lower-cost filing that holds a filing date for 12 months. It is not examined and is abandoned after 12 months unless a nonprovisional application claims its benefit.
When are patent maintenance fees due?
At 3 to 3.5, 7 to 7.5 and 11 to 11.5 years after grant, with a six-month grace period with surcharge after each window.