Astec Rock Crushers Patent Claims Invalid, Judge Rules

Law360, New York (December 5, 2012, 6:14 PM EST) -- A Wisconsin federal judge on Tuesday found that parts of an Astec Industries Inc. patent covering rock-crushing technology were invalid, siding with Metso Minerals Industries Inc., which had sued to prevent an Astec unit from pursuing infringement allegations.

U.S. District Judge Lynn Adelman granted summary judgment in favor of Metso, finding that three claims of Astec's U.S. Patent Number 6,032,886, which covered an invention for use in rock-crushing machines, were either anticipated or obvious in light of prior art. As a result of the anticipation and...
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