Trademark Dilution Under the TDRA: Blurring, Tarnishment, and the Fame Threshold
By Casey Scott McKay ·
Federal dilution law protects a very small club — marks so widely recognized by the general American public that a second user erodes their distinctiveness or reputation even when nobody is confused. This article explains 15 U.S.C. § 1125(c) as Congress rewrote it in the Trademark Dilution Revision Act of 2006, overruling the actual-dilution holding of Moseley (2003) and requiring only a likelihood of dilution. It works through the fame threshold and why niche, regional, and industry fame are each fatal; the six statutory blurring factors as courts actually apply them; the shape of a tarnishment claim; and the statutory exclusions for fair use, news reporting, and noncommercial use. It covers Jack Daniel's Properties (2023), which held that a parody used as a source identifier forfeits the noncommercial-use exclusion, and traces what happened on remand. It treats dilution as a ground for opposition and cancellation at the TTAB, where the timing-of-fame rules differ, and the state antidilution statutes that still matter for regionally famous marks unless the defendant holds a federal registration. Throughout it flags the parts of the doctrine that remain genuinely unsettled, including whether impairment of distinctiveness is a separate element at all.
IP and Technology > Trademarks | Article | Published 4 June 2025 - Updated 22 August 2025 | Casey Scott McKay - marksy.us
Summary. Federal dilution law protects a very small club — marks so widely recognized by the general American public that a second user erodes their distinctiveness or reputation even when nobody is confused. This article explains 15 U.S.C. § 1125(c) as Congress rewrote it in the Trademark Dilution Revision Act of 2006, starting with Moseley v. V Secret Catalogue, 537 U.S. 418 (2003), which demanded proof of actual dilution and which Congress overruled by requiring only a likelihood of dilution. It works through the fame threshold and why niche fame, regional fame, and industry fame are each fatal; the six statutory blurring factors as courts actually apply them; the shape of a tarnishment claim; and the statutory exclusions for fair use, news reporting, and noncommercial use. It covers Jack Daniel's Properties, Inc. v. VIP Products LLC, 599 U.S. 140 (2023), which held that a parody used as a source identifier forfeits the noncommercial-use exclusion, and traces what happened on remand. It treats dilution as a ground for opposition and cancellation at the TTAB, where the timing-of-fame rules differ, and the state antidilution statutes that still matter for regionally famous marks unless the defendant holds a federal registration. Throughout it flags the parts of the doctrine that remain genuinely unsettled, including whether impairment of distinctiveness is a separate element at all.
Keywords: trademark dilution · tdra · dilution by blurring · dilution by tarnishment · famous mark · 15 usc 1125(c) · moseley v v secret catalogue · jack daniels v vip products · niche fame · blurring factors · noncommercial use exclusion · fair use parody · ttab dilution claim · state antidilution statutes · likelihood of dilution · actual association survey · willful dilution damages · trademark trial and appeal board · impairment of distinctiveness
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