Inventor
PROUGH J ROBERT
US38 patents
⚠️ This page may combine multiple inventors who share the name “PROUGH J ROBERT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ANDRITZ INC
14 patentsUS6379504B1Apr 30, 2002
Apparatus for pulping sawdust
ANDRITZ INC17 citations89
US6841042B2Jan 11, 2005
Feeding comminuted fibrous material using high pressure screw and centrifugal pumps
ANDRITZ INC24 citations88
US6436233B1Aug 20, 2002
Feeding cellulose material to a treatment vessel
ANDRITZ INC15 citations84
US6551462B2Apr 22, 2003
System for feeding comminuted fibrous material
ANDRITZ INC13 citations82
US6368453B1Apr 9, 2002
Chip feeding to a comminuted cellulosic fibrous material treatment vessel
ANDRITZ INC14 citations82
US6669410B2Dec 30, 2003
High pressure feeder having smooth pocket in rotor
ANDRITZ INC11 citations74
US6616384B2Sep 9, 2003
High pressure feeder having smooth pocket in rotor
ANDRITZ INC10 citations74
US6468006B1Oct 22, 2002
High pressure feeder having restriction ramp in high pressure inlet
ANDRITZ INC12 citations74
US6451163B2Sep 17, 2002
Method of handling comminuted cellulosic fibrous slurry in a cylindrical vessel
ANDRITZ INC13 citations74
US6451172B1Sep 17, 2002
In-line drainer enhancements
ANDRITZ INC9 citations73
US6447645B1Sep 10, 2002
Feeding cellulose material to a treatment vessel
ANDRITZ INC13 citations73
US6432264B2Aug 13, 2002
Method of making a vessel assembly for handling comminuted cellulosic fibrous material
ANDRITZ INC1 citations63
US7560008B2Jul 14, 2009
Extraction with compaction and springback considerations
ANDRITZ INC0 citations52
US7147750B1Dec 12, 2006
Extraction with compaction and springback considerations
ANDRITZ INC0 citations52
AHLSTROM MACHINERY INC
10 patentsUS5968314AOct 19, 1999
Chip feeding for a digester
AHLSTROM MACHINERY INC43 citations96
US5622598AApr 22, 1997
Chip pumping to a digester
AHLSTROM MACHINERY INC55 citations96
US5985096ANov 16, 1999
Vertical pulping digester having substantially constant diameter
AHLSTROM MACHINERY INC26 citations92
US5766418AJun 16, 1998
Handling fibrous material used to produce cellulose pulp
AHLSTROM MACHINERY INC29 citations92
US5736006AApr 7, 1998
Method and apparatus for pulping with controlled heating to improve delignification and pulp strength
AHLSTROM MACHINERY INC38 citations92
US5700355ADec 23, 1997
Chip feeding for a continuous digester
AHLSTROM MACHINERY INC36 citations92
US5547546AAug 20, 1996
Chip bin with steaming control and a gas vent containing a vacuum and pressure relief device
AHLSTROM MACHINERY INC22 citations92
US5958181ASep 28, 1999
Continuous cooking with a two-stage cool impregnation
AHLSTROM MACHINERY INC14 citations74
USH1681HOct 7, 1997
Discharge from pulping vessels without the aid of mechanical agitation
AHLSTROM MACHINERY INC9 citations73
US5690341ANov 25, 1997
Method and apparatus for the facilitating the servicing of drive-shaft assemblies for pressurized vessels
AHLSTROM MACHINERY INC14 citations68
KAMYR INC
9 patentsUS5476572ADec 19, 1995
Chip feeding for a continuous digester
KAMYR INC62 citations96
US5338366AAug 16, 1994
Acid pre-hydrolysis reactor system
KAMYR INC93 citations94
US4946556AAug 7, 1990
Method of oxygen delignifying wood pulp with between stage washing
KAMYR INC34 citations92
US4577974AMar 25, 1986
Medium consistency mixer rotor and stator construction
KAMYR INC27 citations92
US4731160AMar 15, 1988
Drainage characteristics of mechanical pulp
KAMYR INC23 citations77
US5401361AMar 28, 1995
Completely coutercurrent cook continuous digester
KAMYR INC18 citations74
US4596631AJun 24, 1986
Method of removing latency from medium consistency pulps by pumping the pulp
KAMYR INC13 citations73
US5183536AFeb 2, 1993
Atmospheric diffuser improved lower screens backflushing
KAMYR INC2 citations60
US5116476AMay 26, 1992
Atmospheric diffuser improved lower screens backflushing
KAMYR INC1 citations47
ANDRITZ AHLSTROM INC
5 patentsUS6199299B1Mar 13, 2001
Feeding of comminuted fibrous material to a pulping process
ANDRITZ AHLSTROM INC31 citations92
US6325890B1Dec 4, 2001
Feeding comminuted fibrous material
ANDRITZ AHLSTROM INC29 citations90
US6280575B1Aug 28, 2001
Frusto-conical outlet for a cellulose material treatment vessel
ANDRITZ AHLSTROM INC6 citations74
US6325888B1Dec 4, 2001
Method for pulping sawdust
ANDRITZ AHLSTROM INC11 citations70
US6143134ANov 7, 2000
Chip spreader for air-lock feeder
ANDRITZ AHLSTROM INC1 citations52