Assignee
ANDRITZ INC
US172 patents
Top patents by PatentIndex Score
US7300541B2Nov 27, 2007
High defiberization chip pretreatment
ANDRITZ INC33 citations95
US7892400B2Feb 22, 2011
High defiberization chip pretreatment apparatus
ANDRITZ INC12 citations92
US7758721B2Jul 20, 2010
Pulping process with high defiberization chip pretreatment
ANDRITZ INC24 citations92
US7758720B2Jul 20, 2010
High defiberization pretreatment process for mechanical refining
ANDRITZ INC23 citations92
US7713381B2May 11, 2010
TMP refining of destructured chips
ANDRITZ INC14 citations92
US7300540B2Nov 27, 2007
Energy efficient TMP refining of destructured chips
ANDRITZ INC23 citations92
US7293659B2Nov 13, 2007
Drum structure for rotary drum filtering apparatus and methods of using same
ANDRITZ INC35 citations92
US6899791B2May 31, 2005
Method of pretreating lignocellulose fiber-containing material in a pulp refining process
ANDRITZ INC29 citations92
US6576084B1Jun 10, 2003
Method of pretreating pulp with yield or strength-enhancing additive
ANDRITZ INC18 citations92
USD916890SApr 20, 2021
Display panel portion with a computer icon
ANDRITZ INC41 citations90
US6379504B1Apr 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
US6524436B2Feb 25, 2003
Flash tank steam economy improvement
ANDRITZ INC15 citations87
US7314556B2Jan 1, 2008
Filter disc with panel sectors
ANDRITZ INC32 citations86
US9968938B2May 15, 2018
Refiner plate with gradually changing geometry
ANDRITZ INC6 citations84
US9604221B2Mar 28, 2017
Stator refiner plate element having curved bars and serrated leading edges
ANDRITZ INC10 citations84
US8028945B2Oct 4, 2011
Refiner plates having steam channels and method for extracting backflow steam from a disk refiner
ANDRITZ INC15 citations84
US7900862B2Mar 8, 2011
Mechanical pulping refiner plate having curved refining bars with jagged leading sidewalls and method for designing plates
ANDRITZ INC15 citations84
US7883037B2Feb 8, 2011
Refiner stator plate having an outer row of teeth slanted to deflect pulp and method for pulp deflection during refining
ANDRITZ INC7 citations84
US7766269B2Aug 3, 2010
Refiner stator plate having an outer row of teeth slanted to deflect pulp and method for pulp deflection during refining
ANDRITZ INC9 citations84
US7758726B2Jul 20, 2010
Disc refiner with increased gap between fiberizing and fibrillating bands
ANDRITZ INC15 citations84
US7458533B2Dec 2, 2008
Tooth refiner plates with varying feeding angles and refining method
ANDRITZ INC12 citations84
US6436233B1Aug 20, 2002
Feeding cellulose material to a treatment vessel
ANDRITZ INC15 citations84
US9856601B2Jan 2, 2018
Method and apparatus for adding steam for a steam explosion pretreatment process
ANDRITZ INC7 citations83
US7575658B2Aug 18, 2009
Vacuum washer drum
ANDRITZ INC12 citations83
US6364998B1Apr 2, 2002
Method of high pressure high-speed primary and secondary refining using a preheating above the glass transition temperature
ANDRITZ INC17 citations83
US8342437B2Jan 1, 2013
Deflaker plate and methods relating thereto
ANDRITZ INC14 citations82
US6641336B1Nov 4, 2003
High pressure feeder rotor having conduits for pressure equalization
ANDRITZ INC17 citations82
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
US7357074B2Apr 15, 2008
Compression screw with combination single and double flights
ANDRITZ INC26 citations81
US7823822B2Nov 2, 2010
System and method to align refiner plates during installation on a disc
ANDRITZ INC10 citations80
US11083985B2Aug 10, 2021
Vapor relief strainer with cleaner
ANDRITZ INC7 citations79
US8685205B2Apr 1, 2014
Flash tank with compact steam discharge assembly
ANDRITZ INC8 citations79
US7374050B2May 20, 2008
High capacity and high efficiency filter deck assembly
ANDRITZ INC12 citations79
US8906198B2Dec 9, 2014
Method for production of micro fibrillated cellulose
ANDRITZ INC13 citations77
US7478773B2Jan 20, 2009
Tooth refiner plates having V-shaped teeth and refining method
ANDRITZ INC15 citations77
US8048263B2Nov 1, 2011
Four stage alkaline peroxide mechanical pulpings
ANDRITZ INC15 citations76
US6082907AJul 4, 2000
Pre-loading device for a radical-bearing unit
ANDRITZ INC16 citations76
US11633681B2Apr 25, 2023
Replaceable filter plate assembly for a rotary drum filter
ANDRITZ INC10 citations75
US9206548B2Dec 8, 2015
Cooled smelt restrictor at cooled smelt spout for disrupting smelt flow from the boiler
ANDRITZ INC7 citations74
US6669410B2Dec 30, 2003
High pressure feeder having smooth pocket in rotor
ANDRITZ INC11 citations74
US6649068B2Nov 18, 2003
Filtration of pulp mill liquids
ANDRITZ INC8 citations74
US6616384B2Sep 9, 2003
High pressure feeder having smooth pocket in rotor
ANDRITZ INC10 citations74
US6569289B2May 27, 2003
Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali
ANDRITZ INC9 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
US11441266B2Sep 13, 2022
Disruptor assembly adjustment system and method
ANDRITZ INC3 citations73
US11226095B2Jan 18, 2022
Velocity damper for a recovery boiler
ANDRITZ INC2 citations73
US9145641B2Sep 29, 2015
Apparatus for disperser plate and method to refine paper
ANDRITZ INC4 citations73
Showing the top 50 of 172 patents by PatentIndex Score.