Calculate U.S. utility patent expiration dates using public USPTO data, with continuity, PTA, and terminal disclaimer analysis
Supports formats: 9982190, US 9,982,190, US 10,954,438 B2
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Important: This calculator does not include patent term extension under 35 U.S.C. § 156, which may apply to certain drug, biologic, animal drug, and medical device patents.
Learn more about PTE and patent expirationWe retrieve public USPTO application and prosecution data.
We analyze earliest effective filing date, patent term adjustment, and terminal disclaimer caps.
See the estimated expiration date and the reasoning behind it.
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Results are informational estimates based on public USPTO data. Does not include patent term extension (PTE). Always verify independently.
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Knowing when a patent expires matters for licensing, enforcement, diligence, competitive analysis, and product planning.
For many U.S. utility patents, the answer is not as simple as “20 years from filing.” The expiration date may depend on the earliest effective filing date in a patent family, patent term adjustment (PTA), and terminal disclaimers that cap the term based on related patents.
This calculator helps automate that analysis using public USPTO data.
Traces qualifying parent applications to determine the earliest effective filing date.
Includes patent term adjustment from USPTO prosecution data.
Detects terminal disclaimer activity and estimates whether it caps the patent's term.
Shows the underlying dates and reasoning instead of returning a black-box answer.
Free tools for patent research, monitoring, and analysis.
In-depth guides on patent term calculation, adjustments, and common edge cases.
A comprehensive overview of U.S. patent term rules, including the 20-year baseline and common adjustments.
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How the earliest effective filing date is determined across continuation and divisional patent families.
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What terminal disclaimers are, when they apply, and how they can cap a patent's effective term.
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The key differences between PTA (prosecution delays) and PTE (FDA regulatory delays).
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Step-by-step guidance on tracing the priority chain to identify the controlling filing date.
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Data sourced from public USPTO records. This tool provides informational estimates and should not be relied upon as legal advice. Always verify patent expiration dates independently, especially where patent term extension, terminal disclaimers, or unusual continuity issues may apply.