Escher W GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4650125 Method for sorting fiber stock, especially for manufacturing paper, and sorting apparatus for the performance of such methodExpiredOct 11, 83Mar 17, 87[B02C]
4601819 Sorting apparatus for fiber stock, especially for manufacturing paperExpiredJun 08, 84Jul 22, 86[B07B, B01D, D21C]
4600594 Process for the conditioning of crushed oil-containing seeds prior to flakingExpiredOct 29, 84Jul 15, 86[A23L]
4574496 Ring-gap nozzle and its application in a fluidized bed dryerExpiredJun 19, 85Mar 11, 86[F26B]
4563940 Oil infeed device for an adjustable pitch propellerExpiredApr 04, 83Jan 14, 86[B63H]
4560474 Flotation apparatus for floating fiber suspensions extracted from waste paperExpiredFeb 09, 84Dec 24, 85[B01D]
4557826 Method of and apparatus for separating tacky contaminants from a stock suspensionExpiredApr 11, 83Dec 10, 85[B03B]
4552462 Stirrer apparatus for paper stockExpiredOct 24, 83Nov 12, 85[B01F]
4540341 Adjustable propeller for marine vessel driveExpiredDec 28, 83Sep 10, 85[B63H, B64C]
4538765 Method for defiberizing waste paper in a thick stock rangeExpiredDec 06, 82Sep 03, 85[B02C]
4525916 Method of coupling coaxial shaftsExpiredSep 02, 83Jul 02, 85[B23P]
4501040 Method and apparatus for washing stock suspensions by removing undesired material through an endless wireExpiredAug 05, 82Feb 26, 85[D21C]
4501662 Wire machine, for dewatering stock suspensionsExpiredMay 21, 82Feb 26, 85[D21F, D21C]
4491521 Dewatering apparatusExpiredAug 27, 82Jan 01, 85[D21F, B01D]
4490212 Papermaking machine with central dewatering cylinderExpiredSep 13, 83Dec 25, 84[D21F]
4478684 Papermaking machine stock trim deflecting deviceExpiredJul 11, 83Oct 23, 84[D21G, D21F]
4468287 Band press for a fiber webExpiredDec 14, 81Aug 28, 84[D21F]
4459175 Longitudinal wire papermaking machineExpiredSep 16, 82Jul 10, 84[D21F]
4456183 Fiberizer for stock suspensions for fabricating paperExpiredMar 01, 82Jun 26, 84[B02C]
4447941 Dewatering roll of a wire pressExpiredMay 03, 82May 15, 84[A01B]

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