Short Summary
The PTAB denied Phison Electronics' request to institute a post‑grant review of Vervain's 11,854,612 patent covering mixed‑level NAND flash memory, finding the petitioner had not shown any claim to be unpatentable.
Detailed Summary
Phison Electronics Corporation petitioned for post‑grant review of claims 1‑6 of Vervain, LLC’s U.S. Patent No. 11,854,612 B1, which describes a mixed‑level NAND flash memory system that combines SLC and MLC cells to extend lifetime. The petitioner asserted lack of written description, indefiniteness, and obviousness over the Gavens reference. Vervain countered with detailed specification support and expert testimony. The Patent Trial and Appeal Board concluded that Phison failed to meet the “more likely than not” burden for any claim, declined to institute the review, and denied the petition.
Practitioner Note
This case demonstrates the evidentiary and procedural standards applied in patent matters before local courts. Understanding the court's reasoning in Phison Electronics Corporation vs Vervain, LLC is valuable context for structuring arguments or assessing risk in similar proceedings.
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