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filingDate 2006-10-19-04:00^^<http://www.w3.org/2001/XMLSchema#date>
grantDate 2007-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c47663b524e3077e4e81e47892e3d98d
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publicationDate 2007-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-7244686-B2
titleOfInvention Bearings produced from silicon nitride substances containing sintering additives and SiO2
abstract The present invention is directed to bearings produced from a silicon nitride material. The silicon nitride material consists of a sintering aid selected from the group consisting of Al 2 O 3 and Y 2 O 3 , silicon dioxide, and optionally, up to 10 mole %, based on the amount of silicon nitride, of an additive that reacts with silicon nitride, said additive selected from the group consisting of TiO 2 , WO 3 , MoO 3 and mixtures thereof.
priorityDate 1997-10-20-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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