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IPC Main Group
D01D 4/00

Spinnerette packs; Cleaning thereof

Introduced: January 1980

Last revised: January 2006

Classification Context

Section:
TEXTILES; PAPER
Class:
NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
Subclass:
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS

Filing statistics

IPC D01D 4/00 belongs to the parent subclass D01D, which recorded 48,557 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,204 in 2013 to 4,725 in 2023 (+47%), peaking at 6,066 applications in 2020. The most active applicants in class D01 are NATIONAL DONG HWA UNIVERSITY (1,242 applications), MASCHINENFABRIK RIETER (1,162 applications) and TORAY INDUSTRIES (1,093 applications).

Source: EPO PATSTAT, worldwide filings

4 direct subcodes

Child Classifications

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  • D01D 4/02 Spinnerettes
  • D01D 4/04 Cleaning spinnerettes or other parts of the spinnerette packs
  • 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. 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