APV Chemical Machinery Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5344230 High horsepower hydraulically driven continuous mixing and processing systemExpiredFeb 19, 91Sep 06, 94[B01F, F16H]
5306452 Devolatilizing and/or processing systems and methodsExpiredMar 23, 93Apr 26, 94[B29C]
5129304 Method and apparatus for processing potentially explosive and sensitive materials for forming longitudinally perforated extrudate strandsExpiredMay 15, 91Jul 14, 92[F24B]
4826323 Self-wiping continuous mixer with enlarged bore sectionExpiredMay 23, 88May 02, 89[B29B]
4733970 Extruder screwExpiredSep 09, 85Mar 29, 88[B29B]
4703935 Expansible duct seal construction for batch mixers and the likeExpiredMar 17, 86Nov 03, 87[F16J]
4457882 Centrifugally powered pelletizing machine and methodExpiredDec 13, 82Jul 03, 84[H05B]
4447383 Method of centrifugally pelletizing certain synthetic plastic materialsExpiredFeb 16, 82May 08, 84[B29C]
4412964 Centrifugal pelletizing systems and processExpiredFeb 16, 82Nov 01, 83[B28B]
4408972 Centrifugal pelletizersExpiredFeb 17, 82Oct 11, 83[B22D]
4385876 Split wear liner for twin bore barrel assemblyExpiredMay 31, 78May 31, 83[B03B, B29B, F01C]
4300877 Underwater pelletizerExpiredJan 10, 79Nov 17, 81[B29C]
4185396 Apparatus for cooling rubber and plastic extrudatesExpiredFeb 01, 78Jan 29, 80[F26B]

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