Sprout-Bauer, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5076892 Apparatus for pressurized refining of lignocellulose materialExpiredJul 20, 89Dec 31, 91[D21B, B02C]
5000788 Method for preparing starch based corrugating adhesives using waste wash waterExpiredApr 12, 90Mar 19, 91[C09D]
4991315 Horizontal pellet cooler with improved support trayExpiredFeb 21, 90Feb 12, 91[F26D]
4951888 Refining element and method of manufacturing sameExpiredAug 24, 89Aug 28, 90[B02C]
4915830 Pulp wash pressExpiredAug 19, 88Apr 10, 90[D21C]
4902409 Nozzle for screen apparatusExpiredJan 19, 88Feb 20, 90[B07B]
4896836 Rotary feeder wth metal removing meansExpiredDec 30, 88Jan 30, 90[B02L]
4872617 Canted, spring-loaded feed screw supportExpiredJun 02, 88Oct 10, 89[B02C]
4740128 Apparatus for discharging a reaction vesselExpiredJul 24, 87Apr 26, 88[B65G]
4738404 Rotary knife cutter having roll-off coverExpiredFeb 02, 87Apr 19, 88[B02C]
4732488 Apparatus to uniformly feed plug flow material from storage to line operationExpiredJun 11, 86Mar 22, 88[B01F]
4725336 Refiner apparatus with integral steam separatorExpiredJan 31, 85Feb 16, 88[D21B, D12D]
4725295 Material collector and discharger apparatusExpiredNov 19, 85Feb 16, 88[D21B, B01D]
4697750 Live center bin modificationExpiredSep 04, 85Oct 06, 87[B02C]
4696737 Fiber recovery elutriating hydrocycloneExpiredFeb 28, 86Sep 29, 87[B03D]
4688732 Refiner with improved bearing retainer constructionExpiredAug 15, 86Aug 25, 87[B02C]
4665810 Seal former and flinger discharge assembly for use with apparatus for pressure feeding and pressure cooking a food productExpiredJul 12, 85May 19, 87[A47J]
4664006 Rotary cutter apparatusExpiredSep 27, 85May 12, 87[B26D, B02C]
4619761 Method for screening or fractionationExpiredDec 20, 84Oct 28, 86[B07B, D21C]
4596064 Method for manufacturing a screw flightExpiredJul 18, 84Jun 24, 86[B23P, B21D]

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