ArcelorMittal Sues Severstal, Nisshin Over Steel Patent

ArcelorMittal (MT) USA LLC, part of the world’s biggest steelmaker, sued units of OAO Severstal (CHMF), Russia’s second-largest steelmaker, and Nisshin Steel Holdings Co. (5413) for allegedly infringing a patent for metal used in auto parts.

Michigan-based Severstal Dearborn and West Virginia-based Wheeling-Nisshin Inc. misappropriated technology for the high- strength, aluminum-coated metal, the U.S. arm of Luxembourg- based ArcelorMittal said in a complaint filed yesterday in U.S. District Court in Wilmington, Delaware.

ArcelorMittal “has the sole and exclusive right and license” under the patent, and Severstal and Nisshin should pay damages after a jury trial, the company said in the complaint.

The lawsuit joins a similar action also filed yesterday in the same court by ArcelorMittal against AK Steel Holding Corp. (AKS) over the same patent.

Nisshin President Toshinori Miki didn’t answer the phone at the company’s offices in Tokyo before regular business hours.

“For the past three years, Severstal has successfully defended itself” against ArcelorMittal claims, and “it will continue to successfully defend itself against this most recent complaint,” said Katya Pruett, a Severstal spokeswoman, in an e-mailed message.

The case is ArcelorMittal v. Severstal Dearborn, 13- cv-00686, U.S. District Court, District of Delaware (Wilmington).

To see the patent in the lawsuit, click: RE44,153.

To contact the reporter on this story: Phil Milford in Wilmington, Delaware, at

To contact the editor responsible for this story: Michael Hytha at

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