Executive Summary
The PTAB denied the IPR petition against claims 1-4 of U.S. Patent No. 9,457,541, finding that the combination of prior art references did not render the copper foil obvious. The Board ruled that the petitioner failed to demonstrate a reasonable expectation of success when combining properties from materially different sources.
Practitioner Note
This case demonstrates the evidentiary and procedural standards applied in patent matters before local courts. Understanding the court's reasoning in Solus Advanced Materials Co., Ltd. et al. vs SK nexilis Co., Ltd. is valuable context for structuring arguments or assessing risk in similar proceedings.
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