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IPC Subgroup
D01B 7/02

Cleaning or classifying silk cocoons

Introduced: September 1968

Last revised: January 2006

Full Title

Obtaining silk fibres or filaments > Cleaning or classifying silk cocoons

Classification Context

Section:
TEXTILES; PAPER
Class:
NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
Subclass:
MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OR FILAMENTS, e.g. FOR SPINNING

Filing statistics

IPC D01B 7/02 belongs to the parent subclass D01B, which recorded 5,896 patent applications worldwide between 2013 and 2023. Annual filings grew from 300 in 2013 to 562 in 2023 (+87%), peaking at 666 applications in 2018. 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

Related Keywords

CLASSIFYING silk cocoonsCLEANING silk cocoons

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