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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — PERFORMING OPERATIONSTRANSPORTING
C
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SECTION C — CHEMISTRYMETALLURGY
D
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SECTION D — TEXTILESPAPER
D01
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TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D01
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NATURAL OR ARTIFICIAL THREADS OR FIBRESSPINNING
D02
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YARNSMECHANICAL FINISHING OF YARNS OR ROPESWARPING OR BEAMING
D03
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WEAVING
D04
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BRAIDINGLACE-MAKINGKNITTINGTRIMMINGSNON-WOVEN FABRICS
D05
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SEWINGEMBROIDERINGTUFTING
D06
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TREATMENT OF TEXTILES OR THE LIKELAUNDERINGFLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D07
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ROPESCABLES OTHER THAN ELECTRIC
D21
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PAPER
D21
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PAPER-MAKINGPRODUCTION OF CELLULOSE
D21B
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FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
D21C
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PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALSREGENERATION OF PULPING LIQUORSAPPARATUS THEREFOR
D21D
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TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE [5]
D21F
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PAPER-MAKING MACHINESMETHODS OF PRODUCING PAPER THEREON
D21G
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CALENDERSACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B65H)
D21H
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PULP COMPOSITIONSPREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21DIMPREGNATING OR COATING OF PAPERTREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21GPAPER NOT OTHERWISE PROVIDED FOR [5]
D21H 11/00
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Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only [5]
D21H 13/00
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Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material (chemical features in the manufacture of artificial fibres D01F) [5]
D21H 15/00
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Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution [5]
D21H 17/00
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Non-fibrous material added to the pulp, characterised by its constitutionPaper-impregnating material characterised by its constitution [5]
D21H 19/00
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Coated paper (coated fibreboard D21J 1/08)Coating material (recording sheets characterised by the coating used to improve ink, dye or pigment receptivity B41M 5/50) [5]
D21H 21/00
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Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties [5]
D21H 21/02
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Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control (removal of fats, resins, pitch, or waxes D21C 9/08) [5]
D21H 21/04
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. . Slime-control agents [5]
D21H 21/06
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Paper forming aids [5]
D21H 21/08
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. . Dispersing agents for fibres [5]
D21H 21/10
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. . Retention agents or drainage improvers [5]
D21H 21/12
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. . Defoamers [5]
D21H 21/14
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characterised by function or properties in or on the paper (D21H 19/66, D21H 27/02 take precedence) [5]
D21H 21/16
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. . Sizing or water-repelling agents [5]
D21H 21/18
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. . Reinforcing agents [5]
D21H 21/20
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. . . Wet strength agents [5]
D21H 21/22
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. . Agents rendering paper porous, absorbent or bulky [5]
D21H 21/24
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. . . Surfactants [5]
D21H 21/26
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. . Agents rendering paper transparent or translucent [5]
D21H 21/28
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. . Colorants [5]
D21H 21/30
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. . Luminescent or fluorescent substances, e.g. for optical bleaching (D21H 21/40 takes precedence) [5]
D21H 21/32
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. . Bleaching agents (bleaching cellulose pulp D21C 9/10) [5]
D21H 21/34
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. . Ignifugeants [5]
D21H 21/36
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. . Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents [5]
D21H 21/38
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. . Corrosion-inhibiting agents or anti-oxidants [5]
D21H 21/40
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. . Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M 3/10, D21F 1/44; security printing B41M 3/14; securities or banknotes characterised by colour effects B44F 1/12; testing paper currency or valuable papers for genuineness G07D 7/00) [5]
D21H 21/42
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. . . Ribbons or strips (filaments D21H 15/06) [5]
D21H 21/44
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. . . Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods [5]
D21H 21/46
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. . . . Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators [5]
D21H 21/48
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. . . . Elements suited for physical verification, e.g. by irradiation [5]
D21H 21/50
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characterised by form (D21H 19/66, D21H 21/42, D21H 27/02 take precedence) [5]
D21H 21/52
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. . Additives of definite length or shape [5]
D21H 21/54
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. . . being spherical, e.g. microcapsules, beads [5]
D21H 21/56
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. . Foam [5]
D21H 23/00
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Processes or apparatus for adding material to the pulp or to the paper (applying liquids or other fluent material to surfaces, in general B05; processes for making continuous lengths of paper D21F 11/00) [5]
D21H 25/00
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After-treatment of paper not provided for in groups D21H 17/00-D21H 23/00 [5]
D21H 27/00
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Special paper not otherwise provided for, e.g. made by multi-step processes [5]
D21J
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FIBREBOARDMANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MÂCHÉ (manufacture of articles by dry processes B27N)
D99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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SECTION G — PHYSICS
H
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SECTION H — ELECTRICITY

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