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https://ipverse.greyb.com/ptab-web/cases/case-details/PGR2026-00023 Viance, LLC v. Koppers Performance Chemicals, Inc. - PGR2026-00023 - IP Verse Explore the PTAB proceeding PGR2026-00023 filed by Viance, LLC against Koppers Performance Chemicals, Inc. on Mar 17, 2026. This includes filing dates,... koppers performance chemicalsllcvincip