Waeschle GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6247877 Pipe switch with spherical plugExpiredAug 13, 98Jun 19, 01[B65G]
6237816 Rotary valve and method of operating itExpiredJul 31, 00May 29, 01[G01F]
6186164 Rotary valve comprising a drawing deviceExpiredNov 22, 99Feb 13, 01[F16K]
6186334 Method of and apparatus for screening bulk materialExpiredDec 16, 98Feb 13, 01[G01H, B07B]
6129246 Rotary feeder for dosing bulk materialExpiredAug 24, 98Oct 10, 00[G01F]
6052919 Process for making granulate of polymeric materialExpiredDec 02, 98Apr 25, 00[F26B]
6045009 Rotary valveExpiredJan 20, 99Apr 04, 00[G01F]
6036060 Rotary valveExpiredNov 19, 98Mar 14, 00[G01F]
6032803 Bulk material separatorExpiredOct 26, 98Mar 07, 00[B07B]
6024111 Process for hydraulic transport of bulk materialExpiredDec 10, 98Feb 15, 00[G05D]
5791829 Method of shock-reduced pneumatic plug conveyance of bulk materials and device for implementing the methodExpiredSep 16, 96Aug 11, 98[B65G]
5458245 Device for cleaning a mixture of substantially granular grains and method for cleaning this mixture of grainsExpiredOct 20, 93Oct 17, 95[B07B]
5405061 Rotary feeder for bulk material or liquidsExpiredMay 04, 93Apr 11, 95[A01C, B67D, G01F]
5381933 Rotary feeder for granulated bulk materialExpiredJul 01, 93Jan 17, 95[G01F]
5288111 90 degree elbow for pneumatic transport pipesExpiredApr 06, 92Feb 22, 94[F16L]
5269638 Spherical pipe switch with single channel or double channel cockExpiredMay 04, 92Dec 14, 93[B65G]
5248197 Blending silo with compartmentalized funnelExpiredApr 13, 92Sep 28, 93[B01F]
5238118 Separator with displacement bodyExpiredMay 21, 92Aug 24, 93[B07B]
5226759 Line diverter and sealing arrangement for itExpiredFeb 04, 92Jul 13, 93[B65G]
5207536 Pipe switch with externally arranged drive unitExpiredApr 13, 92May 04, 93[B65G]

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