Chemicals — US PTAB Patent Cases
3 decisions indexed
Page 1 of 1 · 3 total
Viance, LLC v.Koppers Performance Chemicals, Inc.
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.
Clean Chemistry, Inc. et al. v.Enviro Tech Chemical Services, Inc. et al.
Clean Chemistry has petitioned the PTAB to cancel three claims of Enviro Tech’s peracetic‑acid generation patent, alleging anticipation and obviousness over two prior‑art references. The petition details claim constructions and shows overlapping component ratios with the references.
Cargill, Incorporated v.Bunge Loders Croklaan USA, LLC
Cargill's request for rehearing was denied after the PTAB previously denied institution of IPR against Bunge Loders Croklaan USA regarding a vegetable fat composition patent. The Board found that Cargill’s arguments relied on hindsight bias, specifically in selecting prior art examples to meet claimed triglyceride ranges.
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