Processes; Apparatus

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Impregnating wood, e.g. for protection > Processes; Apparatus

CPC:

Impregnating wood, (dyeing, staining B27K5/00) > Processes; Apparatus

CPC subdivides this area 3x more granularly than IPC with 9 additional codes.

9 codes are CPC-only extensions.

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B27K 3/0207 +2 CPC CPC only CPC only
B27K 3/0228 CPC only CPC only
B27K 3/0235 CPC only CPC only
B27K 3/0242 CPC only CPC only
B27K 3/025 CPC only CPC only
B27K 3/0257 CPC only CPC only
B27K 3/0264 CPC only CPC only
B27K 3/0271 CPC only CPC only
B27K 3/0278 +2 CPC CPC only CPC only
B27K 3/04 Impregnating in open tanks IPC+CPC Available in IPC and CPC
B27K 3/06 Sap stream methods IPC+CPC Available in IPC and CPC
B27K 3/08 Impregnating by pressure +2 CPC IPC+CPC Available in IPC and CPC
B27K 3/12 Impregnating by coating the surface of the wood with an impregnating paste IPC+CPC Available in IPC and CPC
B27K 3/14 Bandage methods IPC+CPC Available in IPC and CPC
B27K 3/15 Impregnating involving polymerisation since 1974 +2 CPC IPC+CPC Available in IPC and CPC

Class B27,2013–2023, worldwide · Source: EPO PATSTAT

Class B27,2013–2023, worldwide · Source: EPO PATSTAT