DIFF Main Group
C09K 19/00 Liquid crystal materials
Introduced: January 1985
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 1985.
Child Classifications
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- C09K 19/02 characterised by optical, electrical or physical properties of the components, in general since 1985 +11 CPC IPC+CPC Available in IPC and CPC
- C09K 19/04 characterised by the chemical structure of the liquid crystal components since 1985 +6 CPC IPC+CPC Available in IPC and CPC
- C09K 19/52 characterised by components which are not liquid crystals, e.g. additives since 1985 +5 CPC IPC+CPC Available in IPC and CPC