IPC Subgroup
C09K 19/1 containing at least two benzene rings
Introduced: January 1985
Last revised: January 2006
Full Title
Liquid crystal materials > characterised by the chemical structure of the liquid crystal components > Non-steroidal liquid crystal compounds > containing at least two non-condensed rings > containing at least two benzene rings
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- Subclass:
- MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
6 direct subcodes
Child Classifications
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- C09K 19/12 at least two benzene rings directly linked, e.g. biphenyls
- C09K 19/14 linked by a carbon chain
- C09K 19/2 linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters
- C09K 19/22 linked by a chain containing carbon and nitrogen atoms as chain links, e.g. Schiff bases
- C09K 19/24 linked by a chain containing nitrogen-to-nitrogen bonds
- C09K 19/28 linked by a chain containing carbon and sulfur atoms as chain links, e.g. thioesters
Top Applicants
Top 10 applicants by patent filingsfor 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