Managing Patent Term Across a Family: A Practitioner's Guide to PTA Calculation, PTE Elections, Terminal Disclaimers, and Safe Harbor
By Casey Scott McKay ·
This guide manages patent term as a portfolio discipline rather than a prosecution detail, starting from the family expiration map that most owners have never seen. It specifies how to recalculate adjustment from the file wrapper, apply the overlap rule correctly, audit applicant-delay deductions, and meet the short reconsideration deadline that closes weeks after issuance. It treats the terminal disclaimer as a governed decision with a sign-off requirement, working the term surrendered, the permanent common-ownership constraint, and the alternatives in order of preference. It covers divisional styling and consonance to preserve the Section 121 safe harbor, the extension election that must be prepared before approval because sixty days is not enough, and the double patenting screening that Cellect made necessary. It closes with transaction planning and the annual refresh.
IP and Technology > Patent Counseling Transactions | Guide | Published 29 October 2025 - Updated 11 January 2026 | Casey Scott McKay - marksy.us
Summary. This guide manages patent term as a portfolio discipline rather than a prosecution detail, starting from the family expiration map that most owners have never seen. It specifies how to recalculate adjustment from the file wrapper, apply the overlap rule correctly, audit applicant-delay deductions, and meet the short reconsideration deadline that closes weeks after issuance. It treats the terminal disclaimer as a governed decision with a sign-off requirement, working the term surrendered, the permanent common-ownership constraint, and the alternatives in order of preference. It covers divisional styling and consonance to preserve the Section 121 safe harbor, the extension election that must be prepared before approval because sixty days is not enough, and the double patenting screening that Cellect made necessary. It closes with transaction planning and the annual refresh.
Keywords: family expiration map · adjustment recalculation · overlap rule application · applicant delay audit · reconsideration deadline · terminal disclaimer sign-off · common ownership constraint · distinctness argument · divisional styling · consonance maintenance · safe harbor preservation · extension election analysis · fourteen year cap · sixty day deadline · double patenting screening · Cellect exposure · continuation sequencing · maintenance fee interaction · transaction planning · annual refresh
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