Shinagawa Shirorenga Kabushiki Kaisha

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5688425 Submerged nozzle changing apparatusExpiredJan 03, 96Nov 18, 97[B22D]
5665264 Submerged nozzle mounting/dismounting apparatusExpiredAug 02, 95Sep 09, 97[B22D]
5175134 Ceramic tile produced from sludge slagExpiredAug 19, 91Dec 29, 92[C04B]
5154785 Process for producing a zirconia refractory heating elementExpiredMar 14, 91Oct 13, 92[C04B, B31C]
5073689 Zirconia refractory heating elementExpiredFeb 03, 89Dec 17, 91[H05B, H01C]
4609338 Apparatus for pressure molding firebrickExpiredJan 31, 85Sep 02, 86[B28B]
4451350 Sensor for measuring density of oxygen in molten metalExpiredMar 29, 82May 29, 84[G01N]
4421697 Method and apparatus for casting an inner lining amorphous refractory into a molten metal vesselExpiredMay 07, 82Dec 20, 83[F27D]
4412008 Composite sinter of silicon nitride/boron nitride and method for manufacturing thereofExpiredFeb 11, 81Oct 25, 83[C04B]
4282288 Graphite refractory article having dense structure with low porosityExpiredNov 05, 79Aug 04, 81[B32B]

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