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IPC Main Group
B27K 5/00

Staining or dyeing wood; Bleaching wood; Treating of wood not provided for in groups or

Introduced: September 1968

Last revised: January 2006

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

Filing statistics

IPC B27K 5/00 belongs to the parent subclass B27K, which recorded 15,050 patent applications worldwide between 2013 and 2023. Annual filings grew from 786 in 2013 to 1,019 in 2023 (+30%), peaking at 2,154 applications in 2018. The most active applicants in class B27 are NANJING FORESTRY UNIVERSITY (960 applications), ROBERT BOSCH (762 applications) and HOMAG (384 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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  • B27K 5/02 Staining or dyeing wood; Bleaching wood
  • B27K 5/04 Combined bleaching or impregnating and drying of wood
  • B27K 5/06 Softening or hardening wood

Top Applicants

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

  1. NANJING FORESTRY UNIVERSITY 960
  2. ROBERT BOSCH DE 762
  3. HOMAG DE 384
  4. HARBIN ARTS AND CRAFTS COMPANY 350
  5. NORTHEAST FORESTRY UNIVERSITY 343
  6. SWISS KRONO TEC CH 304
  7. MAKITA CORPORATION 298
  8. DIEFFENBACHERMASCHINEN- UND ANLAGENBAU DE 296
  9. VAELINGE INNOVATION SE 287
  10. HUSQVARNA SE 282