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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

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