characterised by an internal layer formed of separate pieces of material

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form > characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material > characterised by an internal layer formed of separate pieces of material

CPC:

Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form > characterised by a discontinuous layer, i.e. formed of separate pieces of material > characterised by an internal layer formed of separate pieces of material

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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B32B 3/20 of hollow pieces, e.g. tubes; of pieces with channels or cavities IPC+CPC Available in IPC and CPC
B32B 3/22 of spaced pieces IPC+CPC Available in IPC and CPC