Skip over navigation
Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
Collapse
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 (applying liquids or other fluent materials to surfaces in general B05; coating wood or similar material B44D); CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
Collapse
Damping wood
B27K 1/02
.
Apparatus
Collapse
Impregnating wood,
{
e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
}
(dyeing, staining B27K 5/00)
.
{
employing compositions comprising micro-organisms
}
.
{
employing compositions comprising microparticles
}
.
{
employing compositions comprising nanoparticles
}
Collapse
B27K 3/02
.
Processes; Apparatus
Collapse
B27K 3/0207
. .
{
Pretreatment of wood before impregnation
}
B27K 3/0214
. . .
{
Drying (drying in general F26B)
}
. . .
{
Pore opening (B27K 3/0214 takes precedence)
}
B27K 3/0228
. .
{
Spraying apparatus, e.g. tunnels
}
B27K 3/0235
. .
{
Stationary devices on or in legs or poles
}
. .
{
using melt impregnation
}
B27K 3/025
. .
{
Controlling the process
}
B27K 3/0257
. .
{
using rods or tablets, or ampoules, e.g. inserted in pre-drilled cavities
}
. .
{
using staples or nails
}
. .
{
Vapour phase impregnation
}
Collapse
B27K 3/0278
. .
{
involving an additional treatment during or after impregnation
}
B27K 3/0285
. . .
{
for improving the penetration of the impregnating fluid
}
. . .
{
for improving fixation (B27K 3/0285 takes precedence)
}
B27K 3/04
. .
Impregnating in open tanks
B27K 3/06
. .
Sap stream methods
Collapse
B27K 3/08
. .
Impregnating by pressure,
{
e.g. vacuum impregnation
}
. . .
{
along the fibers, i.e. longitudinal impregnation
}
B27K 3/086
. . .
{
using supercritical or high pressure fluids
}
Collapse
B27K 3/10
. . .
Apparatus
B27K 3/105
. . . .
{
Injection apparatus
}
B27K 3/12
. .
Impregnating by coating the surface of the wood with an impregnating paste
. .
Bandage methods
Collapse
. .
Impregnating involving polymerisation
{
including use of polymer-containing impregnating agents (macromolecular compounds derived from lignocellulosic materials C08H; compositions of lignin-containing materials C08L 97/02)
}
NOTE
-

1. When classifying in group B27K 3/15, classification is additionally made in the groups of subclass M08L for defining the chemical polymeric structure
2. In groups B27K 3/16 to B27K 3/50, in the absence of an indication to the contrary, impregnating agents are classified in the last appropriate place

. . .
{
Without in-situ polymerisation, condensation, or cross-linking reactions
}
. . .
{
Combined with grafting onto wood fibres
}
Collapse
.
Inorganic impregnating agents
B27K 3/163
. .
{
Compounds of boron
}
B27K 3/166
. .
{
Compounds of phosphorus
}
B27K 3/18
. .
Compounds of alkaline earth metals
B27K 3/20
. .
Compounds of alkali metals or ammonium
B27K 3/22
. .
Compounds of zinc or copper
B27K 3/24
. .
Compounds of mercury
B27K 3/26
. .
Compounds of iron, aluminium, or chromium
B27K 3/28
. .
Compounds of arsenic or antimony
B27K 3/30
. .
Compounds of fluorine
. .
Mixtures of different inorganic impregnating agents
Collapse
.
Organic impregnating agents
{
(polymers B27K 3/15)
}
B27K 3/343
. .
{
Heterocyclic compounds
}
. .
{
Grafting onto wood fibres (B27K 3/156 takes precedence; macromolecular compounds derived from lignocellulosic materials C08H)
}
B27K 3/36
. .
Aliphatic compounds
Collapse
B27K 3/38
. .
Aromatic compounds
{
(B27K 3/343 takes precedence)
}
B27K 3/40
. . .
halogenated
B27K 3/42
. . .
nitrated, or nitrated and halogenated
Collapse
B27K 3/44
. .
Tar; Mineral oil
B27K 3/46
. . .
Coal tar
B27K 3/48
. . .
Mineral oil
. .
Mixtures of different organic impregnating agents
.
Impregnating agents containing mixtures of inorganic and organic compounds
Collapse
Treating of wood not provided for in groups B27K 1/00, B27K 3/00
B27K 5/0005
.
{
Cryogenic treatment
}
B27K 5/001
.
{
Heating
}
Collapse
B27K 5/0015
.
{
by electric means
}
B27K 5/002
. .
{
Electric discharges, plasma
}
B27K 5/0025
.
{
by magnetic fields
}
Collapse
B27K 5/003
.
{
by using electromagnetic radiation or mechanical waves (infra-red heating of wood B27K 5/001)
}
B27K 5/0035
. .
{
Electron beam-radiation
}
B27K 5/004
. .
{
Gamma-radiation
}
B27K 5/0045
. .
{
X-rays
}
B27K 5/005
. .
{
Laser-light
}
B27K 5/0055
. .
{
Radio-waves, e.g. microwaves
}
B27K 5/006
. .
{
Vibrations
}
B27K 5/0065
. .
{
Ultrasonic treatment
}
Collapse
B27K 5/007
.
{
using pressure (B27K 3/08 takes precedence)
}
B27K 5/0075
. .
{
Vacuum
}
B27K 5/008
. .
{
Supercritical or high pressure fluids
}
Collapse
B27K 5/0085
.
{
Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
}
B27K 5/009
. .
{
using a well-defined temperature schedule
}
B27K 5/0095
.
{
by employing wrappers
}
B27K 5/02
.
Staining or dyeing wood
{
(wood staining compositions C09D 15/00)
}
; Bleaching wood (bleaching wood pulp D21C 9/10)
.
Combined bleaching or impregnating and drying of wood
Collapse
.
Softening or hardening of wood
B27K 5/065
. .
{
Hardening
}
Chemical or physical treatment of cork (mechanical working of cork B27J 5/00)
Collapse
Chemical or physical treatment of reed, straw, or similar material (mechanical working of cane or the like B27J 1/00)
B27K 9/002
.
{
Cane, bamboo
}
B27K 9/005
.
{
Reed
}
B27K 9/007
.
{
Straw
}
Collapse
B27K 2200/00
Wooden materials to be treated
B27K 2200/10
.
Articles made of particles or fibres consisting of wood or other lignocellulosic material (wood composite materials made of particles or fibres B27N)
B27K 2200/15
.
Pretreated particles or fibres
B27K 2200/30
.
Multilayer articles comprising wood (multilayered products B32B)
Collapse
B27K 2240/00
Purpose of the treatment
B27K 2240/10
.
Extraction of components naturally occurring in wood, cork, straw, cane or reed (solvent extraction B01D 11/00)
B27K 2240/15
.
Decontamination of previously treated wood (decontamination in general A62D 3/00)
B27K 2240/20
.
Removing fungi, molds or insects (biocidal compositions A01N; sterilization or disinfection of wood A61L)
B27K 2240/30
.
Fireproofing (fireproofing materials in general C09K 21/00)
B27K 2240/50
.
Ageing
B27K 2240/60
.
Improving the heat-storage capacity
B27K 2240/70
.
Hydrophobation treatment
B27K 2240/90
.
UV-protection
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013