Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Main Group
D21J 3/00

Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds

Introduced: September 1968

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

Child Classifications

Navigate with arrow keys, Enter to open

  • D21J 3/02 of rings IPC+CPC Available in IPC and CPC
  • D21J 3/04 of tubes IPC+CPC Available in IPC and CPC
  • D21J 3/06 of stoppers IPC+CPC Available in IPC and CPC
  • D21J 3/08 of bobbins IPC+CPC Available in IPC and CPC
  • D21J 3/10 of hollow bodies IPC+CPC Available in IPC and CPC
  • D21J 3/12 of sheets; of diaphragms IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class D21,2013–2023, worldwide · Source: EPO PATSTAT

  1. VOITH PATENT DE 1,809
  2. STORA ENSO FI 1,467
  3. KEMIRA FI 1,086
  4. KIMBERLY-CLARK CORPORATION US 935
  5. VALMET TECHNOLOGIES FI 924
  6. VALMET SE 904
  7. P&G (PROCTER & GAMBLE COMPANY) US 862
  8. OJI HOLDINGS CORPORATION 696
  9. OMYA INTERNATIONAL CH 584
  10. SOUTH CHINA UNIVERSITY OF TECHNOLOGY 571

Top Applicants (CPC)

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