C09K 2323/05 Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
Full Title
Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition > Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
Filing statistics
CPC C09K 2323/05 belongs to the parent subclass C09K, which recorded 266,705 patent applications worldwide between 2013 and 2023. Annual filings grew from 18,457 in 2013 to 21,849 in 2023 (+18%), peaking at 28,968 applications in 2018. The most active applicants in class C09 are LG CHEM (7,954 applications), HALLIBURTON ENERGY SERVICES GROUP (6,584 applications) and NITTO DENKO CORPORATION (6,500 applications).
Source: EPO PATSTAT, worldwide filings
5 direct subcodes
Child Classifications
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- C09K 2323/051 Inorganic, e.g. glass or silicon oxide
- C09K 2323/053 Organic silicon compound, e.g. organosilicon
- C09K 2323/055 Epoxy
- C09K 2323/057 Ester polymer, e.g. polycarbonate, polyacrylate or polyester
- C09K 2323/059 Unsaturated aliphatic polymer, e.g. vinyl
Top Applicants
Top 10 applicants by patent filingsfor 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