Challenged claims of Sandvik Intellectual Property AB’s patent that relates to gyratory crushers used for crushing ore, mineral, and rock material to smaller sizes aren’t unpatentable as obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by CMS Cepcor Ltd. and CMS Cepcor Americas LLC. The board determined that the challenged claims aren’t obvious over prior art that discloses a gyratory crusher with a main shaft having a tapered mantle supporting portion, an improved main shaft for a coal pulverizer that provides improved fretting resistance, and improvements in the attachment of gears and ...
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