Hoffmann & Baron’s Defense of Rimfrost Analyzed on Lexology

Hoffmann & Baron has successfully invalidated several patents, asserted against its client, Rimfrost AS, in inter partes review (IPR) proceedings before the Patent Trial and Board (PTAB).  As detailed in the attached article, Hoffmann & Baron utilized those earlier successes at the PTAB to help invalidate another patent owned by the same patentee.  In particular, the PTAB based its unpatentability decision, in part, on its prior findings, and ruled that the patent owner was collaterally estopped from relying on arguments that were previously rejected by the PTAB.

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