Semas, et al. v. Chemetall US, Inc., et al. — 9th Cir. (argued August 12, 2026)
The Ninth Circuit considers whether an earlier trademark case bars David Semas and Metalast from suing Chemeon's distributors over their later use of the phrase formerly Metalast. The Nevada district court dismissed the suit under claim preclusion. The appellants say the distributors were not parties to the first case and that later conduct created new claims. The distributors answer that the cases concern the same conduct and closely aligned parties.
Semas, et al. v. Chemetall US, Inc., et al. (No. 24-6584) — U.S. Court of Appeals for the Ninth Circuit, argued August 12, 2026.
Sources
Argument audio — 24-6584 is the first argument in this Ninth Circuit file (public domain, 17 U.S.C. § 105):https://cdn.ca9.uscourts.gov/datastore/media/2026/08/12/24-6584.mp3
Argument listing — U.S. Court of Appeals for the Ninth Circuit:https://www.ca9.uscourts.gov/cases/streams-videos/archive?case=24-6584&hearingDate=2026-08-12
District-court dismissal order — Justia mirror:https://docs.justia.com/cases/federal/district-courts/nevada/nvdce/3%3A2019cv00125/135755/230
Related-litigation status filing — U.S. Patent and Trademark Office:https://ttabvue.uspto.gov/ttabvue/ttabvue-92064833-CAN-49.pdf
District-court counsel filing — Justia mirror:https://cases.justia.com/federal/district-courts/nevada/nvdce/3%3A2019cv00125/135755/224/0.pdf
Counsel profile — Adam Hosmer-Henner, McDonald Carano:https://www.mcdonaldcarano.com/people/adam-hosmer-henner/
Counsel profile — Michael Hoy, Hoy, Chrissinger Vallas:https://nevadalaw.com/commercial-litigation/
Counsel profile — Lindsay Calhoun, Phelps Dunbar:https://www.phelps.com/professionals/lindsay-calhoun.html
- 0:00Introduction
- 1:43Advocate — Michael Hoy
- 14:11Advocate — Adam Hosmer-Henner
- 24:11Advocate — Lindsay Calhoun