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DIFF Subgroup
C09K 19/42

Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40

Introduced: January 1985

Title

Titles differ between systems:

IPC: Mixtures of liquid crystal compounds covered by two or more of the preceding groups

CPC: Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40

Full Title

Full titles differ between systems:

IPC:

Liquid crystal materials > characterised by the chemical structure of the liquid crystal components > Mixtures of liquid crystal compounds covered by two or more of the preceding groups

CPC:

Liquid crystal materials > characterised by the chemical structure of the liquid crystal components > Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

IPC defines codes here since 1985.

Child Classifications

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  • C09K 19/44 containing compounds with benzene rings directly linked since 1985 IPC+CPC Available in IPC and CPC
  • C09K 19/46 containing esters since 1985 IPC+CPC Available in IPC and CPC
  • C09K 19/48 containing Schiff bases since 1985 IPC+CPC Available in IPC and CPC
  • C09K 19/50 containing steroidal liquid crystal compounds since 1985 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

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

Top Applicants (CPC)

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

  1. LG CHEM KR 7,954
  2. HALLIBURTON ENERGY SERVICES GROUP US 6,584
  3. NITTO DENKO CORPORATION JP 6,500
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
  5. DOW GLOBAL TECHNOLOGIES US 6,324
  6. FUJIFILM JP 5,832
  7. MERCK PATENT DE 5,481
  8. BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
  9. SAMSUNG DISPLAY KR 5,105
  10. NITTO DENKO CORPORATION 3,584