D21H23/42 - CPC Classification Index

ClassID:

127043 ⎘

D21H23/42 - CPC Classification

Classification description:

Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added; Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper Paper being at least partly surrounded by the material on both sides

Sub-classes:

D21H23/44 » Treatment with a gas or vapour 10

Recent Application in this class:

20240247442

2024-07-25

PROCESSING CONVENTIONAL PAPERS AND PULPS INTO HYDROPHOBIC AND WATER-RESISTANT PACKAGING MATERIALS AND TABLEWARE

20220328837

2022-10-13

INTERLAYER MATERIAL FOR LITHIUM-SULFUR BATTERY, AND LITHIUM-SULFUR BATTERY

20130189480

2013-07-25

HONEYCOMB COMPOSITE SUPPORT PART AND METHOD FOR COATING IT

19004327

2025-05-20

Conductive carbon paper and preparation method and use thereof