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CPC Subgroup
D21H 27/22

Structures being applied on the surface by special manufacturing processes, e.g. in presses

Full Title

Special paper not otherwise provided for, e.g. made by multi-step processes > Paper- or board-based structures for surface covering > Structures being applied on the surface by special manufacturing processes, e.g. in presses

2 direct subcodes

Child Classifications

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  • D21H 27/24 characterised by the surface to be covered being phenolic-resin paper laminates, vulcan fibre or similar cellulosic fibreboards

Top Applicants

Top 10 applicants by patent filingsfor class D21, 2013–2023, worldwide · Source: EPO PATSTAT

  1. VOITH PATENT DE 1,857
  2. STORA ENSO FI 1,552
  3. KEMIRA FI 1,173
  4. KIMBERLY-CLARK CORPORATION US 1,107
  5. VALMET TECHNOLOGIES FI 965
  6. VALMET SE 943
  7. P&G (PROCTER & GAMBLE COMPANY) US 941
  8. OMYA INTERNATIONAL CH 821
  9. UPM-KYMMENE CORPORATION FI 512
  10. SEIKO EPSON CORPORATION JP 501