Inventor Lakshmi Arunachalam and her company Pi-Net International have sued more than 80 defendants since 2012, claiming that they infringed Pi-Net’s patents related to online transactions. Along the way skeptical judges and clashes with her own lawyers have sometimes handicapped Arunachalam’s cases, but her latest setback hinged on something a bit more mundane: formatting.

On Monday the U.S. Court of Appeals for the Federal Circuit rejected Pi-Net’s bid to challenge a patent victory for JPMorgan Chase & Co. in one of Arunachalam’s many cases. Siding with JPMorgan and its lawyers at Skadden, Arps, Slate, Meagher and Flom, the Federal Circuit panel ruled that Arunalchalam (who appeared pro se) and William Weidner of the Oregon-based Bell Law Firm tried to skirt a 14,000-word limit in their opening brief by omitting spaces between what should have been separate words.

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