IPC Main Group
D21H 19/00 Coated paper; Coating material
Introduced: January 1990
Last revised: January 2006
Classification Context
- Section:
- TEXTILES; PAPER
- Class:
- PAPER-MAKING; PRODUCTION OF CELLULOSE
- Subclass:
- 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
Related Keywords
coated PAPER
6 direct subcodes
Child Classifications
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- D21H 19/02 Metal coatings
- D21H 19/1 Coatings without pigments
- D21H 19/36 Coatings with pigments
- D21H 19/66 Coatings characterised by a special visual effect, e.g. patterned or textured
- D21H 19/72 Coated paper characterised by the paper substrate
- D21H 19/8 Paper comprising more than one coating
Top Applicants
Top 10 applicants by patent filingsfor class D21, 2013–2023, worldwide · Source: EPO PATSTAT
- VOITH PATENT DE 1,809
- STORA ENSO FI 1,467
- KEMIRA FI 1,086
- KIMBERLY-CLARK CORPORATION US 935
- VALMET TECHNOLOGIES FI 924
- VALMET SE 904
- P&G (PROCTER & GAMBLE COMPANY) US 862
- OJI HOLDINGS CORPORATION 696
- OMYA INTERNATIONAL CH 584
- SOUTH CHINA UNIVERSITY OF TECHNOLOGY 571