IPC Main Group
D02G 1/00 Producing crimped or curled fibres, filaments, yarns or threads, giving them latent characteristics
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- TEXTILES; PAPER
- Class:
- YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- Subclass:
- CRIMPING OR CURLING FIBRES, FILAMENTS, YARNS, OR THREADS; YARNS OR THREADS
Filing statistics
IPC D02G 1/00 belongs to the parent subclass D02G, which recorded 33,915 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,136 in 2013 to 2,565 in 2023 (+20%), peaking at 4,106 applications in 2020. The most active applicants in class D02 are JIANGNAN UNIVERSITY (383 applications), TORAY INDUSTRIES (349 applications) and TORAY INDUSTRIES (281 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
CRIMPING of fibres, filaments, yarns or threadsCURLING of fibres, filaments, yarns or threadscrimping or curling FIBRES
7 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- D02G 1/02 by twisting, fixing the twist and backtwisting, i.e . by imparting false twist
- D02G 1/1 using knife edges, e.g. heated knife edges, for edge crimping
- D02G 1/12 using stuffer boxes
- D02G 1/14 using grooved rollers or gear-wheel-type members
- D02G 1/16 using jets or streams of turbulent gases, e.g. air, steam
- D02G 1/18 by combining fibres, filaments, or yarns, having different shrinkage characteristics
- D02G 1/2 Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
Top Applicants
Top 10 applicants by patent filingsfor class D02, 2013–2023, worldwide · Source: EPO PATSTAT
- JIANGNAN UNIVERSITY 383
- TORAY INDUSTRIES JP 349
- TORAY INDUSTRIES 281
- OERLIKON TEXTILE & COMPANY DE 224
- CONTINENTAL REIFEN DE 208
- NATIONAL DONG HWA UNIVERSITY 203
- KOLON INDUSTRIES KR 188
- WUHAN TEXTILE UNIVERSITY 184
- COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN FR 176
- TMT MACHINERY 155