Patent Office to reissue ArcelorMittal's Usibor patent

Feb 20, 2013 | 05:23 PM | Catherine Ngai

Tags  patent, reissue, U.S. Patent and Trademark Office, dispute, Usibor, ArcelorMittal, AK Steel, Severstal Dearborn Inc. Wheeling-Nisshin Inc.

NEW YORK — The U.S. Patent and Trademark Office will reissue ArcelorMittal SA’s Usibor patent concerning boron steel sheet with an aluminum-based coating.

The move confirms that ArcelorMittal’s U.S. patent 6,296,805 applies to cold-rolled steel for hot stamping and is not limited to hot-rolled steel. ....

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