FI-SubClass-Choice

「SubClass」 in D21 can be selected for this page.

Select the desired 「SubClass」.

  • D21B
  • FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
  • D21C
  • PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
  • D21D
  • TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE[5]
  • D21F
  • PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21G
  • CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B65H)
  • D21H
  • PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21DIMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21GPAPER NOT OTHERWISE PROVIDED FOR[5]
  • D21J
  • FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE (manufacture of articles by dry processes B27N)
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