Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Methods of beating or refining; Beaters of the Hollander type

CPC: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F)

Full titles differ between systems:

IPC:

Methods of beating or refining; Beaters of the Hollander type

CPC:

Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

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D21D 1/002 CPC only CPC only
D21D 1/004 +1 CPC CPC only CPC only
D21D 1/02 Methods of beating; Beaters of the Hollander type IPC+CPC Available in IPC and CPC
D21D 1/20 Methods of refining IPC+CPC Available in IPC and CPC

Class D21,2013–2023, worldwide · Source: EPO PATSTAT

Class D21,2013–2023, worldwide · Source: EPO PATSTAT