Cooperative Patent Classification


Version: 2017.02
CPC
COOPERATIVE PATENT CLASSIFICATION
D21J
FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE (manufacture of articles by dry processes B27N) [2013-01]
D21J 1/00
Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F) [2013-01]
D21J 1/02
.
Cutting, e.g. using wet saws [2013-01]
D21J 1/04
.
Pressing [2013-01]
D21J 1/06
.
Drying [2013-01]
D21J 1/08
.
Impregnated or coated fibreboard [2013-01]
D21J 1/10
.
After-treatment [2013-01]
D21J 1/12
. .
Hardening [2013-01]
D21J 1/14
. .
Conditioning [2013-01]
D21J 1/16
.
Special fibreboard [2013-01]
D21J 1/165
. .
{Roofing material} [2013-01]
D21J 1/18
. .
Hardboard [2013-01]
D21J 1/20
. .
Insulating board [2013-01]
D21J 3/00
Manufacture of articles by pressing wet fibre pulp, or papier-mâchè, between moulds [2013-01]
D21J 3/02
.
of rings [2013-01]
D21J 3/04
.
of tubes [2013-01]
D21J 3/06
.
of stoppers [2013-01]
D21J 3/08
.
of bobbins [2013-01]
D21J 3/10
.
of hollow bodies [2013-01]
D21J 3/12
.
of sheets; of diaphragms [2013-01]
D21J 5/00
Manufacture of hollow articles by transferring sheets, produced from fibre suspensions or papier-mâchè by suction on wire-net moulds, to couch-moulds [2013-01]
D21J 7/00
Manufacture of hollow articles from fibre suspensions or papier-mâchè by deposition of fibres in or on a wire-net mould [2013-01]