characterised by components which are not liquid crystals, e.g. additives

Introduced: January 1985

Full Title

Liquid crystal materials > characterised by components which are not liquid crystals, e.g. additives

CPC subdivides this area 3x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

Note: 5 CPC extensions are marked as secondary classification only.

IPC defines codes here since 1985.

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C09K 19/54 Additives having no specific mesophase since 1985 +1 CPC IPC+CPC Available in IPC and CPC
C09K 19/58 Dopants or charge transfer agents since 1985 +2 CPC IPC+CPC Available in IPC and CPC
C09K 19/60 Pleochroic dyes since 1985 +5 CPC IPC+CPC Available in IPC and CPC
C09K 2019/521 2nd only CPC only CPC only
C09K 2019/523 2nd only CPC only CPC only
C09K 2019/525 2nd only CPC only CPC only
C09K 2019/526 2nd only CPC only CPC only
C09K 2019/528 2nd only CPC only CPC only

Class C09,2013–2023, worldwide · Source: EPO PATSTAT

LG CHEM KR 6,420
NITTO DENKO CORPORATION JP 5,752
HALLIBURTON ENERGY SERVICES GROUP US 5,650
3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 5,635
DOW GLOBAL TECHNOLOGIES US 4,844
MERCK PATENT DE 4,779
CHINESE ACADEMY OF SCIENCES 4,311
FUJIFILM JP 4,205
BASF (BADISCHE ANILIN & SODA FABRIK) DE 4,039
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,931

Class C09,2013–2023, worldwide · Source: EPO PATSTAT

LG CHEM KR 7,954
HALLIBURTON ENERGY SERVICES GROUP US 6,584
NITTO DENKO CORPORATION JP 6,500
3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
DOW GLOBAL TECHNOLOGIES US 6,324
FUJIFILM JP 5,832
MERCK PATENT DE 5,481
BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
SAMSUNG DISPLAY KR 5,105
NITTO DENKO CORPORATION 3,584