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CPC Main Group
D01D 4/00

Spinnerette packs; Cleaning thereof (, D01D5/24, D01D5/253, D01D5/28 take precedence)

Filing statistics

CPC D01D 4/00 belongs to the parent subclass D01D, which recorded 38,312 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,035 in 2013 to 3,260 in 2023 (+60%), peaking at 4,746 applications in 2020. The most active applicants in class D01 are TORAY INDUSTRIES (1,268 applications), MASCHINENFABRIK RIETER (1,200 applications) and NATIONAL DONG HWA UNIVERSITY (955 applications).

Source: EPO PATSTAT, worldwide filings

4 direct subcodes

Child Classifications

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  • D01D 4/04 Cleaning spinnerettes or other parts of the spinnerette packs (cleaning in general B08B)
  • D01D 4/06 Distributing spinning solution or melt to spinning nozzles
  • D01D 4/08 Supporting spinnerettes or other parts of spinnerette packs

Top Applicants

Top 10 applicants by patent filingsfor 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