CPC Definition - Subclass B27K
This place covers:
Methods and apparatus for the following treatments of wood:
- Dampening;
- Impregnating;
- Staining;
- Dyeing;
- Bleaching;
- Softening;
- Hardening; and
- other methods and apparatus for treating of wood with permeant liquids, unless provided for in other subclasses.
Methods and apparatus for bleaching or impregnating wood in combination with drying;
Methods and apparatus for chemical or physical treatment of cork;
Methods and apparatus for chemical or physical treatment of cane, reed, straw, bamboo or similar fibrous material of plant origin;
Selection (i.e. use) of chemical substances for the treatments covered by this subclass, unless provided for in other subclasses.
This subclass covers the selection of chemical substances, i.e. the use thereof, for the treatments covered by the subclass. Substances or compositions per-se are not covered by this subclass.
The structure or composition of the chemical substances selected is covered by pure chemistry classes C01, C07, or C08. Special activities or special properties of the chemical substances selected are covered in places for these activities or properties, for example in A01N (biocides), A62D 1/00 (fire extinguishing compositions), C09B (dyes), C09D (stains) or C09K (anti-oxidant compositions or fireproofing materials).
This place does not cover:
Biocidal compositions | |
Fire-extinguishing compositions | |
Coating wood | |
Planing, drilling, milling, or turning wood | |
Mechanical working of veneer or plywood | |
Applying adhesives or glue to surfaces of wood to be joined | |
Bending wood | |
Mechanical working of cane, cork, or of tree or plant material not otherwise provided for | |
Debarking, splitting wood, manufacture of veneer, wooden sticks, wood shavings, chips, powder, or the like | |
Compressing, punching out, burning or charring wood | |
Manufacture or reconditioning of specific semi-finished or finished wood articles | |
Manufacture of articles made by dry processes from particles or fibres consisting of wood or other lignocellulosic or like organic material; after-treatment of these articles | |
Impregnation of stoppers for bottles, jars, or similar containers | |
Impregnation of matches | |
Water repellent compositions of oils, fats or waxes or of derivatives thereof | |
Woodstains | |
Drying-oils, siccatives | |
Fireproofing materials | |
Paper-pulp impregnation | |
Impregnation and after-treatment of fibreboard manufactured by wet processes | |
Protection of building elements, e.g. against pests or fire | |
Drying solid materials | |
Treatment of materials for manufacturing musical instruments |
Attention is drawn to the following places, which may be of interest for search:
Apparatus for applying liquids or other fluent materials to surfaces | |
Multilayer materials (essentially comprising wood B32B 21/00; impregnation, colouring B32B 38/00) | |
Artistic painting or surface treatment | |
Compositions inhibiting chemical change, e.g. of antioxidants | |
Building materials, also made of wood | |
Roof coverings, also made of wood | |
Flooring made of wood |
In this place, the following terms or expressions are used with the meaning indicated:
Dampening | Treating wood for increasing its water content (e.g. by steaming) |
Dyeing | Treating a material with a soluble colouring substance that has an affinity to the material to which it is applied (as opposed to colouring with a pigment, which is usually insoluble) |
Impregnation | Incorporation of a substance into the pores of a material by absorption, adsorption or penetration |
OSB | Oriented strand board |
Staining | Treating a surface with a paint that is formulated to transport the pigment into the pores of the surface, rather than creating a film on top of the surface |
Thermal treatment | Treatment of wood at temperatures well over 100°C allowing for the modification of its chemical structure |
Wood | Natural whole wood, or wood-based products other than those made from fibres or particles, for example plywood or laminated veneer lumber |
This place covers:
Methods and apparatus for increasing the water content of the wood. The main purpose of such treatments is to prevent cracking of wood by overdrying.
Steam drying wood is covered by F26B.
In this place, the following terms or expressions are used with the meaning indicated:
Dampening or damping | Humidifying, moistening |
This place covers:
Methods and apparatus for impregnating wood and for pre- and after-treatments related to wood impregnation.
This place does not cover:
Biocides, Pest repellants | |
Fire-extinguishing compositions | |
Coating wood | |
Manufacture of articles made by dry processes from particles or fibres consisting of wood or other lignocellulosic or like organic material; after-treatment of these articles | |
Impregnation of stoppers for bottles, jars, or similar containers | |
Impregnation of matches | |
Water repellent compositions of oils, fats or waxes or of derivatives thereof | |
Woodstains | |
Drying-oils | |
Siccatives | |
Fireproofing materials | |
Paper-pulp impregnation | |
Impregnation and after-treatment of fibreboard manufactured by wet processes | |
Protection of building elements, e.g. against pests or fire | |
Treatment of materials for manufacturing musical instruments |
In this place, the following terms or expressions are used with the meaning indicated:
Active component | A component of an impregnation mixture which is essential for the purpose of the impregnation. Solvents, surfactants, thickeners, and the like are normally not falling within this definition |
Biocidal compositions characterised by their form are covered by A01N 25/00.
In this place, the following terms or expressions are used with the meaning indicated:
Microparticles | Particles with diameters between 0.1-100 microns |
Biocidal compositions characterised by their form are covered by A01N 25/00.
In this place, the following terms or expressions are used with the meaning indicated:
Nanoparticles | particles with diameters between 1-100 nm |
This place covers:
Pre-treatments aimed to open the wood pores, excepting drying.
This place covers:
Impregnation processes employing melted solids.
This place covers:
Impregnation processes employing staples or nails made of materials with biocidal properties.
This place covers:
Impregnation processes employing biocides in vapour phase.
Polymer impregnation for improving the fixation of an impregnation agent should be not classified here, but only in B27K 3/15 and/or its subgroups.
This place covers:
Impregnation processes employing a pressure gradient along the wood fibres.
This place covers:
Impregnation processes employing a bandage for storing and releasing the impregnation agent.
This place covers:
Impregnation processes involving the use of polymerized or polycondensed substances.
Macromolecular compounds derived from lignocellulosic materials are covered by C08H. Compositions of lignocellulosic containing materials are covered by C08L 97/02.
The documents of this head group are classified additionally in C08L 101/16 and C08K for information regarding the chemical nature of the polymer composition employed in impregnation.
This place covers:
Impregnation processes involving substances polymerized or polycondensed before impregnation.
The documents of this subgroup are classified additionally in C08L 101/16 and C08K for information regarding the chemical nature of the polymer composition employed in impregnation.
This place covers:
Impregnation processes involving the use of polymerized or polycondensed substances which react with the chemical structure of wood.
The documents of this subgroup are classified additionally in C08L 101/16 and C08K for information regarding the chemical nature of the polymer composition employed in impregnation.
Inorganic biocidal compositions are covered by A01N.
This head group covers impregnation processes involving the use of inorganic substances either not covered by the subgroups B27K 3/163 - B27K 3/32, or when their chemical nature is not especially relevant.
This head group and its subgroups B27K 3/163 - B27K 3/30 refer only to the active components of the impregnation mixtures.
This subgroup covers impregnation processes characterized by the presence of a synergistic effect caused by at least two active inorganic components. The active inorganic components should be classified in their specific subgroups B27K 3/163 - B27K 3/30, too.
Organic biocidal compositions are covered by A01N.
This head group covers impregnation processes involving the use of organic substances either not covered by the subgroups B27K 3/343 - B27K 3/48, or when their chemical nature is not especially relevant.
This head group and its subgroups B27K 3/343 - B27K 3/48 refer only to the active components of the impregnation mixtures.
This place covers:
Impregnation processes involving the use of organic substances which react with the chemical structure of wood.
This subgroup covers impregnation processes characterized by the presence of a synergistic effect caused by at least two active organic components. The active organic components should be classified in their specific subgroups B27K 3/343 - B27K 3/48, too.
This subgroup covers impregnation processes characterized by the presence of a synergistic effect caused by at least one inorganic and at least one organic component. The active components should be classified in their specific subgroups B27K 3/163 - B27K 3/30 and B27K 3/343 - B27K 3/48, respectively, too.
This place does not cover:
Coating wood | |
Planing, drilling, milling, or turning wood | |
Mechanical working of veneer or plywood | |
Applying adhesives or glue to surfaces of wood to be joined | |
Bending wood | |
Mechanical working of cane, cork, or of tree or plant material not otherwise provided for | |
Debarking, splitting wood, manufacture of veneer, wooden sticks, wood shavings, chips, powder, or the like | |
Compressing, punching out, burning or charring wood | |
Manufacture or reconditioning of specific semi-finished or finished wood articles | |
Manufacture of articles made by dry processes from particles or fibres consisting of wood or other lignocellulosic or like organic material; after-treatment of these articles | |
Woodstains | |
Drying solid materials | |
Treatment of materials for manufacturing musical instruments |
Pre-drying before impregnation is covered by B27K 3/0214. The polymerizing, condensation, or cross-linking of the impregnating compositions comprising monomers or polymers is normally not covered by this group.
Processes inherently leading to softening or hardening, like dampening, polymer impregnation, or thermal treatment are classified here only in connection with a special effect.
This place does not cover:
This place does not cover:
Attention is drawn to the following places, which may be of interest for search:
Manufacture by dry processes of articles with or without organic binding agents, made from particles or fibres consisting of wood or other lignocellulosic or like organic material |
Attention is drawn to the following places, which may be of interest for search:
Layered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honey comb, form |
Attention is drawn to the following places, which may be of interest for search:
Solvent extraction |
Attention is drawn to the following places, which may be of interest for search:
Processes for making harmful chemical substances harmless or less harmful, by effecting chemical change in the substances |
Attention is drawn to the following places, which may be of interest for search:
Attention is drawn to the following places, which may be of interest for search:
Fireproofing materials in general |