IPC 2013 : D21H 19/30 : Polyamides; Polyimides.

IPC2013 > D > D21 > D21H > D21H 19/00 > D21H 19/30[4] > Polyamides; Polyimides.
D SECTION D — TEXTILES; PAPER.
D21 PAPER-MAKING; PRODUCTION OF CELLULOSE.
D21H PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR.
D21H 19/00 Coated paper (coated fibreboard D21J 1/08 ); Coating material (recording sheets characterised by the coating used to improve ink, dye or pigment receptivity B41M 5/50).
D21H 19/30 · · · · Polyamides; Polyimides.