The Three Payments That Prevent Expiration
[vc_row triangle_shape="no"][vc_column][vc_column_text css=""] Utility Patents Require Three Maintenance Payments Under 35 U.S.C. Section 41(b), maintenance fees on an issued utility patent come due at 3.5, 7.5, and 11.5 years after the patent's grant date. Missing any one of these three payments causes the patent to lapse, regardless of how much time remains on the original 20-year term measured from the filing date. This staged payment structure differs considerably from foreign patent systems, which often require annual annuity payments that increase steadily throughout the patent's life rather than three larger payments spread across specific milestones. A Brooklyn patent lawyer tracks these maintenance deadlines carefully for...
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