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DIFF Main Group
D01D 5/00

Formation of filaments, threads, or the like

Introduced: September 1968

Of 17 combined children, 16 exist in both systems.

1 codes are CPC-only extensions.

6 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • D01D 5/02 Starting the formation IPC+CPC Available in IPC and CPC
  • D01D 5/04 Dry spinning methods IPC+CPC Available in IPC and CPC
  • D01D 5/06 Wet spinning methods IPC+CPC Available in IPC and CPC
  • D01D 5/11 Flash-spinning since 1980 IPC+CPC Available in IPC and CPC
  • D01D 5/18 by means of rotating spinnerets IPC+CPC Available in IPC and CPC
  • D01D 5/20 with varying denier along their length IPC+CPC Available in IPC and CPC
  • D01D 5/253 with a non-circular cross section; Spinnerette packs therefor (D01D5/38 takes precedence) since 1980 IPC+CPC Available in IPC and CPC
  • D01D 5/26 Formation of staple fibres (by flash-spinning D01D5/11) IPC+CPC Available in IPC and CPC
  • D01D 5/38 Formation of filaments, threads, or the like during polymerisation since 1980 IPC+CPC Available in IPC and CPC
  • D01D 5/40 by applying a shearing force to a dispersion or solution of filament formable polymers, e.g. by stirring since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class D01,2013–2023, worldwide · Source: EPO PATSTAT

  1. NATIONAL DONG HWA UNIVERSITY 1,242
  2. MASCHINENFABRIK RIETER CH 1,162
  3. TORAY INDUSTRIES JP 1,093
  4. TORAY INDUSTRIES 802
  5. JIANGNAN UNIVERSITY 771
  6. WUHAN TEXTILE UNIVERSITY 663
  7. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 653
  8. CHINESE ACADEMY OF SCIENCES 559
  9. LENZING AT 525
  10. MURATA MACHINERY 492

Top Applicants (CPC)

Class D01,2013–2023, worldwide · Source: EPO PATSTAT

  1. TORAY INDUSTRIES JP 1,268
  2. MASCHINENFABRIK RIETER CH 1,200
  3. NATIONAL DONG HWA UNIVERSITY 955
  4. LENZING AT 602
  5. P&G (PROCTER & GAMBLE COMPANY) US 594
  6. WUHAN TEXTILE UNIVERSITY 494
  7. TRUETZSCHLER & COMPANY DE 453
  8. KOLON INDUSTRIES KR 433
  9. OERLIKON TEXTILE & COMPANY DE 430
  10. CHINESE ACADEMY OF SCIENCES 412