CRIMPING OR CURLING FIBRES, FILAMENTS, YARNS, OR THREADS; YARNS OR THREADS

Description

This subclass covers mechanical processes and apparatus for introducing permanent crimp, curl, or wave structures into textile fibres, filaments, yarns, and threads. It encompasses heat-setting methods, mechanical deformation techniques, and devices that create textured properties for improved elasticity, bulk, and aesthetic characteristics in yarns. The classification includes equipment for continuous and batch processing of various fibre types and the resulting crimped or curled yarn products intended for subsequent textile manufacture.

Filing statistics

IPC subclass D02G 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