D21H 27/32 with materials applied between the sheets (attaching together paper or cardboard sheets B31F5/00; adhesives C09J)
Introduced: January 1990
Title
Titles differ between systems:
IPC: with materials applied between the sheets
CPC: with materials applied between the sheets (attaching together paper or cardboard sheets B31F5/00; adhesives C09J)
Full Title
Full titles differ between systems:
Special paper not otherwise provided for, e.g. made by multi-step processes > Multi-ply > with materials applied between the sheets
Special paper not otherwise provided for, e.g. made by multi-step processes > Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00) > with materials applied between the sheets (attaching together paper or cardboard sheets B31F5/00; adhesives C09J)
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1990.
Child Classifications
Navigate with arrow keys, Enter to open
- D21H 27/34 Continuous materials, e.g. filaments, sheets, nets since 1990 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
Class D21,2013–2023, worldwide · Source: EPO PATSTAT
- VOITH PATENT DE 1,857
- STORA ENSO FI 1,552
- KEMIRA FI 1,173
- KIMBERLY-CLARK CORPORATION US 1,107
- VALMET TECHNOLOGIES FI 965
- VALMET SE 943
- P&G (PROCTER & GAMBLE COMPANY) US 941
- OMYA INTERNATIONAL CH 821
- UPM-KYMMENE CORPORATION FI 512
- SEIKO EPSON CORPORATION JP 501