D01F 9/1 by decomposition of organic substances
Introduced: July 1974
Last revised: January 2006
Full Title
Man-made filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments > of inorganic material > by decomposition of organic substances
Classification Context
- Section:
- TEXTILES; PAPER
- Class:
- NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- Subclass:
- CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
Filing statistics
IPC D01F 9/1 belongs to the parent subclass D01F, which recorded 59,217 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,958 in 2013 to 5,366 in 2023 (+36%), peaking at 6,465 applications in 2020. 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
Top Applicants
Top 10 applicants by patent filingsfor class D01, 2013–2023, worldwide · Source: EPO PATSTAT
- NATIONAL DONG HWA UNIVERSITY 1,242
- MASCHINENFABRIK RIETER CH 1,162
- TORAY INDUSTRIES JP 1,093
- TORAY INDUSTRIES 802
- JIANGNAN UNIVERSITY 771
- WUHAN TEXTILE UNIVERSITY 663
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 653
- CHINESE ACADEMY OF SCIENCES 559
- LENZING AT 525
- MURATA MACHINERY 492