D21H - CPC Classification
Classification description:
Sub-classes:
- D21H1/00 » IPC4 groups 13
- D21H1/00 » IPC4 groups 13
- D21H1/00 » Paper; Cardboard 13
- D21H1/00 » Paper; Cardboard 13
- D21H11/00 » Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only 170
- D21H13/00 » Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material 41
- D21H15/00 » Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution 31
- D21H17/00 » Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution 61
- D21H19/00 » Coated paper ; Coating material 73
- D21H21/00 » Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties 15
- D21H23/00 » Processes or apparatus for adding material to the pulp or to the paper 18
- D21H25/00 » After-treatment of paper not provided for in groups to 9
- D21H27/00 » Special paper not otherwise provided for, e.g. made by multi-step processes 273
- D21H3/00 » Paper or cardboard prepared by adding substances to the pulp or to the formed web on the paper-making machine {and by applying substances to finished paper or cardboard (on the paper-making machine), also when the intention is to impregnate at least a part of the paper body} 8
- D21H5/00 » Special paper or cardboard not otherwise provided for 12
