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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE (manufacture of articles by dry processes B27N)
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Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F)
D21J 1/02
.
Cutting, e.g. using wet saws
D21J 1/04
.
Pressing
D21J 1/06
.
Drying
D21J 1/08
.
Impregnated or coated fibreboard
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D21J 1/10
.
After-treatment
D21J 1/12
. .
Hardening
D21J 1/14
. .
Conditioning
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.
Special fibreboard
D21J 1/165
. .
{
Roofing material
}
D21J 1/18
. .
Hardboard
. .
Insulating board
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Manufacture of articles by pressing wet fibre pulp, or papier-mâchè, between moulds
D21J 3/02
.
of rings
D21J 3/04
.
of tubes
D21J 3/06
.
of stoppers
D21J 3/08
.
of bobbins
D21J 3/10
.
of hollow bodies
D21J 3/12
.
of sheets; of diaphragms
Manufacture of hollow articles by transferring sheets, produced from fibre suspensions or papier-mâchè by suction on wire-net moulds, to couch-moulds
Manufacture of hollow articles from fibre suspensions or papier-mâchè by deposition of fibres in or on a wire-net mould
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Last Modified: 10/10/2013