METSO FIBER KARLSTAD AB

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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
 
  
 
B01D SEPARATION 7127
 
  
 
D21D TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE 27
 
  
 
B07B SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, OR SIFTING OR BY USING GAS CURRENTS; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL 120
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 155
 
  
 
F03B MACHINES OR ENGINES FOR LIQUIDS 123

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6336994 Totally chlorine free bleaching process using recovered filtrateMay 02, 95Jan 08, 02[D21C]
6258206 Process for purifying condensate while evaporating waste liquorsAug 19, 98Jul 10, 01[B01D, D21C]
6113742 Digester having screening arrangement for isothermal cooking of fibrous materialJul 21, 97Sep 05, 00[D21C]
6071377 Process for obtaining flue gases with low content of NO.sub.x in a black liquor recovery boilerJun 04, 98Jun 06, 00[D21C]
6063238 Black liquor impregnation in digesterMay 06, 98May 16, 00[D21C]
5989394 Process for treatment of a contaminated liquidJul 09, 97Nov 23, 99[B01D]
5944950 Process for the final evaporation of black liquorJun 27, 97Aug 31, 99[B01D, D21C]
5925216 Method of continuous pulping in a digester with high black liquor usage in the impregnation stageAug 05, 97Jul 20, 99[D21C]
5919337 Method of continuously isothermally cooking of pulpMay 18, 95Jul 06, 99[D21C]
5879422 Separating arrangement and method for counteracting foam formationSep 22, 97Mar 09, 99[B01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0210,392 METHOD FOR PRODUCING CELLULOSE PULP IN A CONTINUOUS DIGESTER IN AN ENERGY-EFFICIENT MANNERAbandonedDec 10, 07Sep 04, 08[D21C]
6946072 Method and apparatus for washing a fibre suspensionExpiredOct 23, 01Sep 20, 05[B01D, D21C]
6887345 Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substancesExpiredNov 20, 01May 03, 05[B01D, D21C]
6699357 Process for continuous cooking of pulpExpiredSep 28, 01Mar 02, 04[D21C]
6605181 Peroxide bleach sequence including an acidic bleach stage and including a wash stageExpiredMar 28, 94Aug 12, 03[D21C]
6395171 Strainer arrangement for straining liquid from a mixing arrangementExpiredJul 07, 99May 28, 02[B01D]
6332950 Method in connection with the pretreatment of comminuted fibrous materialExpiredDec 17, 99Dec 25, 01[D21C]
6254335 Device for admixing a first fluid into a second fluidExpiredOct 09, 97Jul 03, 01[F04D]
6233983 Washing apparatus comprising a float bodyExpiredSep 17, 99May 22, 01[D21D, D21C]
6156159 Device for mixing of a fluid into a pulp-suspensionExpiredSep 29, 99Dec 05, 00[D01G]
6095028 Hydraulic unitExpiredJun 08, 98Aug 01, 00[F15B]
6030492 Impregnation of cellulose-containing material with black liquor in a single vessel digesterExpiredJan 20, 98Feb 29, 00[D21C]
5967335 Screening device for screening a suspensionExpiredJun 06, 97Oct 19, 99[B07B]
5913458 Apparatus for adjusting the axial position of a rotary feederExpiredApr 24, 97Jun 22, 99[F16K]
5824187 Method for the continuous cooking of pulpExpiredFeb 18, 97Oct 20, 98[D21C]
5820729 Device and process for dissolving smelt from recovery boilersExpiredAug 12, 97Oct 13, 98[D21C]
5771817 Recovery boilerExpiredDec 17, 96Jun 30, 98[F23G]
5716497 Method and device for the continuous cooking of pulpExpiredJun 12, 96Feb 10, 98[D21C]
5089086 Process for continuous cooking of celluloseExpiredApr 25, 90Feb 18, 92[D21C]

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