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CPC Subgroup
D21H 17/06

Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals

Full Title

Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution > Non-macromolecular organic compounds > containing elements other than carbon and hydrogen only > Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals

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