• All sections
• D - Textiles; paper
• D21H - Pulp compositions; preparation thereof not covered by subclasses , ; impregnating or coating of paper; treatment of finished paper not covered by class or subclass ; paper not otherwise provided for
• D21H 21/14 - 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 characterised by function or properties in or on the paper

Patent holdings for IPC class D21H 21/14

Total number of patents in this class: 501

10-year publication summary

Principal owners for this class