By: Andrew Chung

Dow Chemical Co failed in an attempt to rescue two of its patents from invalidation and salvage $30 million in damages in a decade-long feud with Nova Chemicals Corp when a U.S. appeals court declined to rehear its case on Thursday.

The ruling by the U.S. Court of Appeals for the Federal Circuit, while a victory for Nova and its attorneys from Finnegan Henderson Farabow Garrett & Dunner because it denied full-court review, came with two unusual opinions that appeared to suggest the previous three-judge panel had nonetheless made mistakes in finding Dow's patents too vague.

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Originally Published: Reuters