Sato Iron Works Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5800055 Temperature control system and kneading-mixing extrusion apparatus having the temperature control systemExpiredMar 19, 97Sep 01, 98[B29C]
5738884 Multi-stage vacuum kneading-extruder apparatusExpiredSep 03, 96Apr 14, 98[B29C]
5639159 Apparatus for mixing, kneading and extruding materialExpiredApr 05, 96Jun 17, 97[B29B]
5589203 Vacuum kneading and extruding apparatusExpiredJul 13, 95Dec 31, 96[B29C]
5347725 Method and apparatus for vacuum drying colloidal substancesExpiredMay 24, 93Sep 20, 94[F26B]
5055027 Screw type extruding apparatusExpiredSep 06, 89Oct 08, 91[B29C]

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