Description
Class B27K : PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR
Subclass 3/06: Impregnating wood (staining or dyeing wood B27K 5/02 ; combined impregnating and drying B27K 5/04 ) Processes; Apparatus Sap stream methods