Assignee
ANDRITZ OY
FI90 patents
Top patents by PatentIndex Score
US6514380B1Feb 4, 2003
Treatment of chemical pulp
ANDRITZ OY44 citations91
US7267146B2Sep 11, 2007
Chipper bed knife
ANDRITZ OY11 citations82
US7640750B2Jan 5, 2010
Apparatus and method for producing energy at a pulp mill
ANDRITZ OY17 citations81
US6776876B1Aug 17, 2004
Method of treating cellulosic pulp to remove hexenuronic acid
ANDRITZ OY41 citations81
US8002994B2Aug 23, 2011
Method and apparatus for thickening lime mud in a disc filter
ANDRITZ OY13 citations74
US6733629B1May 11, 2004
Method of controlling the operation of an approach system of a paper machine or the like web formation apparatus
ANDRITZ OY7 citations74
US7328808B2Feb 12, 2008
Apparatus for sorting wood chips in separate fractions
ANDRITZ OY7 citations73
US6736934B1May 18, 2004
Method of pretreating pulp in an acid tower prior to bleaching with peroxide
ANDRITZ OY12 citations73
US6767432B1Jul 27, 2004
Apparatus for the thickening of fiber suspensions
ANDRITZ OY9 citations71
US6619345B2Sep 16, 2003
Arrangement for a debarking shaft
ANDRITZ OY8 citations71
US6615884B2Sep 9, 2003
Debarking shaft for a debarking machine
ANDRITZ OY9 citations71
US6588467B2Jul 8, 2003
Arrangement in the discharge end of a debarking machine
ANDRITZ OY8 citations71
US6579091B1Jun 17, 2003
Cleaning device for cleaning air ports of a furnace
ANDRITZ OY10 citations71
US6461473B1Oct 8, 2002
Supply of washing liquid in a fractionating multi-stage washer
ANDRITZ OY13 citations71
US6742463B2Jun 1, 2004
Combustion air system for recovery boilers, burning spent liquors from pulping processes
ANDRITZ OY11 citations69
US6733625B2May 11, 2004
Method and apparatus for treating pulp
ANDRITZ OY9 citations69
US7988820B2Aug 2, 2011
Method for cleaning and/or cooling a liquor gun in a chemical recovery boiler
ANDRITZ OY5 citations68
US9901853B2Feb 27, 2018
Method and apparatus for washing pulp by means of intensified suction
ANDRITZ OY2 citations66
US12173798B2Dec 24, 2024
Sealing arrangement for detecting thickness of a sealing element of a seal
ANDRITZ OY2 citations64
US6578529B2Jun 17, 2003
Arrangement for feeding black liquor into a recovery boiler
ANDRITZ OY12 citations64
US7070677B2Jul 4, 2006
Method and apparatus for treating pulp with filler
ANDRITZ OY2 citations63
US12503417B2Dec 23, 2025
Method of purifying raw methanol
ANDRITZ OY0 citations62
US9719209B2Aug 1, 2017
Method for leaching recovery-boiler ash
ANDRITZ OY2 citations62
US8020594B2Sep 20, 2011
Debarking mechanism
ANDRITZ OY2 citations62
US7128216B2Oct 31, 2006
Closed air circulation system
ANDRITZ OY6 citations62
US6978899B2Dec 27, 2005
Apparatus for sorting wood chips in separate fractions
ANDRITZ OY6 citations62
US6491787B2Dec 10, 2002
Method for heating pulps
ANDRITZ OY4 citations62
US7831084B2Nov 9, 2010
Control of a recovery boiler or alike
ANDRITZ OY2 citations61
US6647726B2Nov 18, 2003
Method and arrangement for producing electrical energy at a pulp mill
ANDRITZ OY6 citations61
USRE38317ENov 18, 2003
Method and apparatus for treating filler-containing material, such as recycled fibers
ANDRITZ OY3 citations61
US6605184B1Aug 12, 2003
Method and apparatus for treatment of fiber suspension containing minerals, such as coated broke, in paper production
ANDRITZ OY2 citations61
US6619346B2Sep 16, 2003
Debarking machine
ANDRITZ OY3 citations60
US7661376B2Feb 16, 2010
System for producing energy at a pulp mill
ANDRITZ OY5 citations59
US7207280B2Apr 24, 2007
Combustion air system for recovery boilers, burning spent liquors from pulping processes
ANDRITZ OY5 citations59
US6797125B2Sep 28, 2004
Method of treating condensates
ANDRITZ OY10 citations59
US11473241B2Oct 18, 2022
Method of producing chemical pulp
ANDRITZ OY0 citations58
US6579411B1Jun 17, 2003
Bleaching medium consistency pulp with ozone
ANDRITZ OY3 citations57
US6547923B1Apr 15, 2003
Process for bleaching medium consistency pulp with ozone using a pressurized fluidizing mixer
ANDRITZ OY2 citations57
US6582601B1Jun 24, 2003
Method and apparatus for separating soap
ANDRITZ OY5 citations56
US6419481B2Jul 16, 2002
Cooler for rotary kilns
ANDRITZ OY5 citations56
US10132495B2Nov 20, 2018
Method and system for monitoring the mass changes of heat exchangers of a steam boiler
ANDRITZ OY3 citations55
US9562323B2Feb 7, 2017
Recovery boiler plant of a chemical pulp mill
ANDRITZ OY2 citations55
US7931152B2Apr 26, 2011
Shuffling apparatus and method for aligning wood logs in a conveyor
ANDRITZ OY4 citations55
US7569200B2Aug 4, 2009
Method for reducing nitrogen oxide emissions
ANDRITZ OY2 citations55
US6761799B2Jul 13, 2004
Method and arrangement for combusting black liquor
ANDRITZ OY4 citations55
US6736937B2May 18, 2004
Method and apparatus for controlling the operation of the short circulation of a paper, paperboard or the like production machine
ANDRITZ OY2 citations54
US12331835B2Jun 17, 2025
Method and arrangement for washer seal control
ANDRITZ OY0 citations53
US7143899B2Dec 5, 2006
Filter element and method for manufacturing the plates thereof
ANDRITZ OY2 citations53
US12479876B2Nov 25, 2025
Method of removing volatile compounds from a lignin-containing material, use of a distillation method, and a lignin-containing material
ANDRITZ OY0 citations50
US12054886B2Aug 6, 2024
Method for producing oxidized lignin in kraft pulp mill
ANDRITZ OY0 citations50
Showing the top 50 of 90 patents by PatentIndex Score.