• All sections
• D - Textilespaper
• D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
• D21H 23/40 - 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 only one side of the paper being in contact with the material

Patent holdings for IPC class D21H 23/40

Total number of patents in this class: 6

10-year publication summary

Principal owners for this class