NEW YORK The U.S. Patent
and Trademark Office will reissue ArcelorMittal SAs
Usibor patent concerning boron steel sheet with an
The move confirms that
ArcelorMittals U.S. patent 6,296,805 applies to
cold-rolled steel for hot stamping and is not limited to
The Luxembourg-based steelmaker
previously argued that AK Steel Corp., Severstal Dearborn Inc.
and Wheeling-Nisshin Inc. had infringed upon its Usibor patent,
but the defendants said their products underwent a cold-rolled
process prior to coating and thermal treatment, meaning
ArcelorMittals patent did not apply (
amm.com, Dec. 3). ArcelorMittal had argued that its
patent applied to both cold-rolled and hot-rolled steel.
The U.S. Patent and Trademark
Offices decision "is in agreement with
ArcelorMittals position that the Usibor patent applies
notably to cold-rolled steel for hot stamping," a spokeswoman
said in a statement. "ArcelorMittal is pleased with the
decision confirming its patent rights for this innovative
technology and will continue to vigorously enforce and defend
its patent rights against any potential infringement."
AK Steel and Wheeling-Nisshin declined to comment. Severstal
could not be reached for comment.