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IPC Main Group
D01C 5/00

Carbonising rags to recover animal fibres

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
TEXTILES; PAPER
Class:
NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
Subclass:
CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES

Filing statistics

IPC D01C 5/00 belongs to the parent subclass D01C, which recorded 2,096 patent applications worldwide between 2013 and 2023. Annual filings declined from 149 in 2013 to 144 in 2023 (-3%), peaking at 255 applications in 2015. 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

CARBONISATION of rags to recover animal fibrestreating RAGS chemically to obtain fibres for spinning

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