AHLSTROM MACHINERY INC.

Patent Owner

Watch Compare Add to Portfolio

Stats

Details

Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D21C PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR1613
 
  
 
B01F MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING 240
 
  
 
B67D DISPENSING, DELIVERING, OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR 240
 
  
 
B01D SEPARATION 1133
 
  
 
B65D CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES 197

Top Patents (by citation)

Upgrade to the Professional Level to View Top Patents for this Owner. Learn More

Recent Publications

  • No Recent Publications to Display

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6174411 Continuous digester with inverted top separatorNov 17, 98Jan 16, 01[D21C]
6071331 Method and apparatus for separating gas from a gaseous materialJun 01, 95Jun 06, 00[B01D]
6024837 Low temperature gas phase continuous digesterJan 27, 98Feb 15, 00[D21C]
5968314 Chip feeding for a digesterOct 21, 97Oct 19, 99[D21C]
5882477 Continuous digester with a low temperature gas-phaseFeb 10, 97Mar 16, 99[D21C]
5813758 Concentric ring fluidizing mixerDec 10, 93Sep 29, 98[B01F]
5795438 Method and apparatus for feeding multiple digestersNov 04, 96Aug 18, 98[D21C]
5779856 Cooking cellulose material using high alkali concentrations and/or high pH near the end of the cookOct 24, 96Jul 14, 98[D21C]
5736006 Method and apparatus for pulping with controlled heating to improve delignification and pulp strengthOct 10, 96Apr 07, 98[D21C]
5711600 High consistency pulp tower with a parting member and the introduction of dilution liquidJun 07, 95Jan 27, 98[B01F, D21C]

View all patents..

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6284095 Minimization of malodorous gas release from a cellulose pulp mill feed systemExpiredJan 14, 00Sep 04, 01[D21C]
6241851 Treatment of cellulose material with additives while producing cellulose pulpExpiredFeb 10, 99Jun 05, 01[D21C]
6199299 Feeding of comminuted fibrous material to a pulping processExpiredApr 06, 98Mar 13, 01[F26B]
6176971 Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquorsExpiredNov 18, 98Jan 23, 01[D21C]
6153300 Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicalsExpiredApr 18, 94Nov 28, 00[D02G]
6143134 Chip spreader for air-lock feederExpiredOct 22, 99Nov 07, 00[D21C]
6123808 Distribution of dilution liquor to the discharge of a cellulose pulp digesterExpiredDec 09, 97Sep 26, 00[D21C]
6120647 Simplified liquid removal system for a cellulose pulp digesterExpiredJan 26, 98Sep 19, 00[D21C]
6106667 Treatment of recycled bleach plant filtratesExpiredMar 31, 92Aug 22, 00[D21C]
6024227 Tramp material removal from pulp feed systemsExpiredAug 04, 97Feb 15, 00[B04C]
6010594 Method of bleaching pulp with chlorine-free chemicals wherein a complexing agent is added immediately after an ozone bleach stageExpiredSep 15, 97Jan 04, 00[D21C]
5985096 Vertical pulping digester having substantially constant diameterExpiredSep 23, 97Nov 16, 99[D21C]
5882475 Method of recovering fibers from a reject stream generated in a wastepaper treating processExpiredMar 26, 97Mar 16, 99[D21B]
5766418 Handling fibrous material used to produce cellulose pulpExpiredSep 13, 96Jun 16, 98[D21C]
5701829 Apparatus for recovering heat in a spent liquor recovery boilerExpiredApr 13, 95Dec 30, 97[F23G]
5690341 Method and apparatus for the facilitating the servicing of drive-shaft assemblies for pressurized vesselsExpiredJun 17, 96Nov 25, 97[F16J]
H001681 Discharge from pulping vessels without the aid of mechanical agitationExpiredSep 18, 95Oct 07, 97[D21C]
5639347 Method of controlling of metals in a bleach plant, using oxidationExpiredAug 31, 93Jun 17, 97[D21C]
5635025 Digester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chuteExpiredDec 05, 94Jun 03, 97[D21C]
5607549 Method for the manufacture of cooking liquors of different sulphidity by green liquor crystallizationExpiredJun 15, 95Mar 04, 97[D21C]

View all patents..

Top Inventors for This Owner

Upgrade to the Professional Level to View Top Inventors for this Owner. Learn More

We are sorry but your current selection exceeds the maximum number of comparisons () for this membership level. Upgrade to our Level for up to -1 comparisons!

We are sorry but your current selection exceeds the maximum number of portfolios (0) for this membership level. Upgrade to our Level for up to -1 portfolios!.