Short Summary
ProAmpac has filed an IPR petition seeking cancellation of all 15 claims of U.S. Patent 11,072,148, asserting anticipation and obviousness over four prior‑art references.
Detailed Summary
In a petition for Inter Partes Review (IPR2025‑01143), ProAmpac Holdings Inc. challenges the validity of every claim in U.S. Patent No. 11,072,148, which covers a recyclable packaging stack with a thin aluminum layer and protective coating. The petitioner contends that the invention is fully anticipated by the 2014 Gundlach publication and that the remaining claim scope is obvious when combining Gundlach with Yializis (2009), Rebouillat (2015), and the industry‑standard Voluntary Standard Reference (2013). Six distinct statutory grounds—anticipation under 35 U.S.C. § 102 and obviousness under § 103—are asserted, each mapping specific claim limitations to the cited references. No secondary considerations are presented, and the petition requests that the PTAB institute the IPR and cancel all claims.
Practitioner Note
This case demonstrates the evidentiary and procedural standards applied in patent matters before local courts. Understanding the court's reasoning in ProAmpac Holdings Inc. vs Sigma Technologies Int'l, LLC et al. is valuable context for structuring arguments or assessing risk in similar proceedings.
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