PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING OR BLEACHING OF WOOD, OR FOR TREATING OF WOOD WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS

Introduced: September 1968

Last revised: July 1974

Classification Context

Section:: PERFORMING OPERATIONS; TRANSPORTING
Class:: WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
Subclass:: PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING OR BLEACHING OF WOOD, OR FOR TREATING OF WOOD WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS

Description

B27K covers processes, apparatus, and chemical or physical treatment substances for impregnating, staining, dyeing, or bleaching wood and related fibrous materials (cork, cane, reed, straw). This includes methods and equipment for applying permeant liquids to wood that are not covered by more specific subclasses, such as preservative treatments, colorization processes, and surface modifications using chemical or physical means. The classification encompasses both the treatment procedures and the selection or formulation of substances used in these operations, excluding treatments already classified under dedicated preservation or specialized wood-working processes.

Additional Content

Glossary

Wood Natural whole wood, or wood-based products other than those made from fibres, for example plywood or laminated veneer lumber. Impregnating Incorporating a substance into the pores of a material by absorption, adsorption or penetration, for example by soaking the material in the substance or by treating the material with the substance under pressure. Impregnating can for example be done in order to protect a material against destructive outside influences, such as fungal decay, pests or water. 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. 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). Dampening Treating wood, for example with steam, in order to increase its water content.

Limiting references

Bending of wood Impregnation of stoppers for bottles, jars or similar containers Impregnation of matches ,

Related Keywords

chemical or physical treatment of BARKBLEACHING of wood or similar materialsDYEING of wood or similar materialsFIREPROOFING of wood or similar materialsHARDENING of wood or similar materialsIMPREGNATING of wood or similar materialsselection of compounds for IMPREGNATING of wood or similar materialsMOISTENING of wood or similar materialschemical or physical treatment of PITHPRESERVING of woodPROOFING woodchemical or physical treatment of REEDSSOFTENING wood or similar materialsSTAINING wood or similar materialchemical or physical treatment of STRAW(S)chemical or physical treatment of WOOD

5 direct subcodes

Child Classifications

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B27K 1/00 Dampening wood
B27K 3/00 Impregnating wood, e.g. for protection
B27K 5/00 Staining or dyeing wood; Bleaching wood; Treating of wood not provided for in groups or
B27K 7/00 Chemical or physical treatment of cork
B27K 9/00 Chemical or physical treatment of reed, straw, or similar material

Top Applicants

Top 10 applicants by patent filingsfor class B27, 2013–2023, worldwide · Source: EPO PATSTAT

NANJING FORESTRY UNIVERSITY 960
ROBERT BOSCH DE 762
HOMAG DE 384
HARBIN ARTS AND CRAFTS COMPANY 350
NORTHEAST FORESTRY UNIVERSITY 343
SWISS KRONO TEC CH 304
MAKITA CORPORATION 298
DIEFFENBACHERMASCHINEN- UND ANLAGENBAU DE 296
VAELINGE INNOVATION SE 287
HUSQVARNA SE 282