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Patent
Trademark
Copyright
Design
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Decision Verdict Date
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Petitioner / Claimant (Plaintiff)
Viance, LLC
Respondent / Defendant
Koppers Performance Chemicals, Inc.
Dispute Summary
Viance, LLC has filed a post‑grant review petition seeking cancellation of all 27 claims of Koppers' wood preservative patent (US 12,370,716), alleging lack of written description and that the claims are anticipated or obvious over multiple prior‑art references.
Outcome / Ruling
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