METSO CHEMICAL PULPING OY

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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 THEREFOR226
 
  
 
D21F PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON128

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6533896 Method for the production of precleaned pulpJun 08, 00Mar 18, 03[D21C]
6413367 Treatment of cellulosic material with a chelating agent prior to alkaline delignificationAug 03, 01Jul 02, 02[D21C]
6334933 PressDec 14, 00Jan 01, 02[D21F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6719878 Method for avoiding mechanical damage of pulpExpiredFeb 26, 02Apr 13, 04[D21C]
6387216 Long shoeless nip pressExpiredFeb 20, 01May 14, 02[D21F]

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