Genericide: How Escalator, Aspirin, and Thermos Lost Their Trademarks
By Casey Scott McKay ·
Genericide is the one trademark defect that gets worse the better your marketing works: when the public adopts your brand name as the name of the product itself, the mark dies and no amount of investment revives it. This article traces the doctrine from Learned Hand's 1921 aspirin decision through the cancellation of ESCALATOR and the split-the-difference remedy in the THERMOS litigation to the modern statutory primary significance test codified at 15 U.S.C. 1064(3) and 1127, then explains the two-step genus-and-perception framework the Federal Circuit and the TTAB apply, the evidence that actually decides these cases, and why Teflon surveys usually beat Thermos surveys. It covers Elliott, which held that verb use is not automatically generic use, and Booking.com, which rejected a per se rule against generic.com marks. It maps the recurring fact patterns that kill marks - first-of-its-kind products with no generic name, key-characteristic terms, compound marks, acronyms, and foreign equivalents - and identifies where the law is genuinely unsettled. Finally, it explains why genericness pierces incontestability, can be raised at any time, and travels differently in federal court than at the TTAB.
IP and Technology > Trademarks | Article | Published 14 January 2026 - Updated 28 May 2026 | Casey Scott McKay - marksy.us
Summary. Genericide is the one trademark defect that gets worse the better your marketing works: when the public adopts your brand name as the name of the product itself, the mark dies, and no amount of investment revives it. This article traces the doctrine from Learned Hand's 1921 aspirin decision through the cancellation of ESCALATOR, the split-the-difference remedy in the THERMOS litigation, and the modern statutory primary significance test codified at 15 U.S.C. § 1064(3) and § 1127. It explains the two-step genus-and-perception framework the Federal Circuit and the TTAB apply, the evidence that actually decides these cases, and why Teflon surveys usually beat Thermos surveys. It covers Elliott v. Google, which held that verb use is not automatically generic use, and USPTO v. Booking.com, which rejected a per se rule against generic.com marks. It maps the recurring fact patterns that kill marks — first-of-its-kind products with no generic name, key-characteristic terms, compound marks, acronyms, and foreign equivalents — and identifies where the law is genuinely unsettled. Finally, it explains why genericness pierces incontestability, can be raised at any time, and travels differently in federal court than at the TTAB.
Keywords: genericide · generic trademark · primary significance test · 15 usc 1064(3) · trademark cancellation · thermos · aspirin · escalator · booking.com · elliott v. google · teflon survey · thermos survey · genus of goods · who are you what are you · de facto secondary meaning · incontestability · genericness refusal · trademark style guide
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