IPC Classification

Class code (prefix) Descriptions Number of results
D21J 1/00 Fibreboard
D21J 1/02 Cutting, e.g. using wet saws
D21J 1/04 Pressing
D21J 1/06 Drying
D21J 1/08 Impregnated or coated fibreboard
D21J 1/10 After-treatment
D21J 1/12 Hardening
D21J 1/14 Conditioning
D21J 1/16 Special fibreboard
D21J 1/18 Hardboard
D21J 1/20 Insulating board
D21J 3/00 Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
D21J 3/02 Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of rings
D21J 3/04 Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of tubes
D21J 3/06 Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of stoppers
D21J 3/08 Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of bobbins
D21J 3/10 Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of hollow bodies
D21J 3/12 Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of diaphragms
D21J 5/00 Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch moulds
D21J 7/00 Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould