TTAB Proceedings: Opposition vs. Cancellation
By Casey Scott McKay ·
Oppositions and cancellations are the same tribunal, the same rules, and largely the same grounds — separated by one event: registration. This article explains what actually changes when a mark crosses that line, starting with the 30-day publication window under 15 U.S.C. § 1063 and the extension ladder that stretches it to 180 days, and then the two clocks that govern cancellation: the five-year cutoff in § 1064(1) that closes off likelihood of confusion and descriptiveness forever, and the handful of grounds in § 1064(3), (5), and (6) that never expire. It works through the quiet asymmetry most people miss — the § 1057(b) presumption of validity that an applicant does not have and a registrant does — and shows how that single presumption shifts burdens, budgets, and settlement leverage. It covers entitlement to a statutory cause of action after Lexmark and Corcamore, the grounds that actually get pleaded, the defenses that behave differently on each side of the line, compulsory counterclaims, and the standard 18-month schedule from institution order to reply brief. It maps the four other ways to attack a registration that are not TTAB cancellations at all — letters of protest, expungement, reexamination, and court-ordered cancellation under 15 U.S.C. § 1119 — and closes with the preclusion trap from B&B Hardware, the places the doctrine is genuinely unsettled, and a table of the authorities that decide most cases.
IP and Technology > Trademarks | Article | Published 15 January 2026 - Updated 20 January 2026 | Casey Scott McKay - marksy.us
Summary. Oppositions and cancellations run in the same tribunal under nearly the same rules on nearly the same grounds. One event separates them: registration. This article explains what actually changes when a mark crosses that line — the 30-day window under 15 U.S.C. § 1063 and the extension ladder that stretches it to 180 days; the five-year cutoff in § 1064(1) that permanently closes off confusion and descriptiveness claims; the grounds that never expire; and the § 1057(b) presumption of validity that quietly moves the burden of proof from one side of the table to the other. It covers entitlement to sue after Lexmark and Corcamore, the grounds and defenses that behave differently before and after registration, compulsory counterclaims, the standard 18-month schedule, and the four ways to kill a registration that are not cancellations at all. It ends with the B&B Hardware preclusion trap, the genuinely unsettled questions, and a table of controlling authority.
Keywords: ttab · notice of opposition · petition for cancellation · inter partes proceeding · 15 usc 1063 · 15 usc 1064 · five-year cancellation window · extension of time to oppose · entitlement to a statutory cause of action · estta · standard protective order · accelerated case resolution · b&b hardware issue preclusion · compulsory counterclaim · expungement and reexamination · section 18 restriction · trademark official gazette · laches in ttab proceedings · section 1071 appeal
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