How does foreign priority affect patent term?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-29 10 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. Foreign priority does not affect the calculation of patent term in the United States. As stated in the MPEP, Foreign priority under 35 U.S.C. 119(a)-(d) , 365(a) , 365(b) , 386(a) , or 386(b) is not considered in determining the term of a patent . This means that the 20-year term is calculated from the U.S. filing date, not the foreign priority date. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Priority Not Considered in Patent Term Determination MPEP 2701 Prohibited Term of Patent Is 20 Years From Filing Date MPEP 2701 Required Patent Term Ends at US Filing Date MPEP 2701 Term Not Affected by Foreign Priority MPEP 2701 Patent Term Is Twenty Years From Filing Date MPEP 2701 Patent Term Begins on Issuance and Ends at 20 Years From Filing MPEP 2701 Patent Term Not Extended Beyond Disclaimed Date MPEP 2701 Term Ends at 20 Years From Filing Date MPEP 2701 Design Patents Include International Applications MPEP 2701 Permitted Patent Terms Reduced by Terminal Disclaimers MPEP 2701 Other Related FAQs 5 FAQs Collapse How do continuing applications affect patent term? How is the patent term calculated for design patents? How long is the term for design patents? What are patent term extensions and adjustments? What are the key differences in patent terms for applications filed before June 8, 1995?