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ANDRITZ AHLSTROM INC

Overview
  • Total Patents
    70
About

ANDRITZ AHLSTROM INC has a total of 70 patent applications. Its first patent ever was published in 1992. It filed its patents most often in United States, Japan and Finland. Its main competitors in its focus markets textiles and paper, chemical engineering and machines are BAHIA SPECIALTY CELLULOSE SA, IMPCO VOEST ALPINE PULP TECH and KUESS VICTOR JOSEPH.

Patent filings in countries

World map showing ANDRITZ AHLSTROM INCs patent filings in countries
# Country Total Patents
#1 United States 32
#2 Japan 12
#3 Finland 11
#4 Canada 9
#5 Sweden 5
#6 Australia 1

Patent filings per year

Chart showing ANDRITZ AHLSTROM INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Stromberg C Bertil 20
#2 Prough J Robert 18
#3 Phillips Joseph R 10
#4 Marcoccia Bruno S 9
#5 Laakso Richard O 8
#6 Stroemberg Bertil C 6
#7 Ryham Rolf C 6
#8 Henricson Kaj O 5
#9 Pease Tim S 5
#10 Johanson Jerry R 5

Latest patents

Publication Filing date Title
FI20010851A0 Arrangement and method for feeding cellulosic material
FI20010854A0 Process for treating cellulosic material
FI20010008A0 A process for preparing a chemical pulp
CA2327248A1 Environmentally-friendly fiberline for producing bleached chemical pulp
CA2318027A1 Treating pulp with yield or strength-enhancing additive
US6346166B1 Flash tank steam economy improvement
US6336993B1 Metal removal from comminuted fibrous material during feeding
US6325890B1 Feeding comminuted fibrous material
US6284095B1 Minimization of malodorous gas release from a cellulose pulp mill feed system
US6261412B1 Regenerative heat recovery for high temperature condensate stripping plants
US6143134A Chip spreader for air-lock feeder
US6280569B1 Compression rings for column relief in continuous cooking vessels
US6280575B1 Frusto-conical outlet for a cellulose material treatment vessel
US6186373B1 Hopper, or bin, screw feeder construction controlling discharge velocity profile
US6241851B1 Treatment of cellulose material with additives while producing cellulose pulp
US6165323A Screen plate having a plurality of inclined slots in a digester
US6176971B1 Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors
US6174411B1 Continuous digester with inverted top separator
US6277240B1 Method for continuously pulping cellulosic fibrous material
US6132556A Method of controlling pulp digester pressure via liquor extraction