D TEXTILES; PAPER
D01 NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
D01F CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
9/00 Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
D01F9/08 of inorganic material
D01F9/12 Carbon filaments; Apparatus specially adapted for the manufacture thereof