C09K 19/04
Liquid crystal materials: characterised by the chemical structure of the liquid crystal
Official title: characterised by the chemical structure of the liquid crystal components {, e.g. by a specific unit}
C09K19/04 (Liquid crystal materials: characterised by the chemical structure of the liquid crystal) appears on 6,148 US grants and 4,515 published applications in this corpus.
Search patents in C09K- Granted patents
- 6,148
- Published applications
- 4,515
- Assignees
- 994
- Inventors
- 6,668
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 49 | 0 |
| 1977 | 40 | 0 |
| 1978 | 28 | 0 |
| 1979 | 23 | 0 |
| 1980 | 31 | 0 |
| 1981 | 24 | 0 |
| 1982 | 39 | 0 |
| 1983 | 37 | 0 |
| 1984 | 46 | 0 |
| 1985 | 50 | 0 |
| 1986 | 77 | 0 |
| 1987 | 94 | 0 |
| 1988 | 105 | 0 |
| 1989 | 150 | 0 |
| 1990 | 127 | 0 |
| 1991 | 138 | 0 |
| 1992 | 159 | 0 |
| 1993 | 203 | 0 |
| 1994 | 183 | 0 |
| 1995 | 162 | 0 |
| 1996 | 134 | 0 |
| 1997 | 130 | 0 |
| 1998 | 161 | 0 |
| 1999 | 125 | 0 |
| 2000 | 127 | 0 |
| 2001 | 117 | 20 |
| 2002 | 91 | 105 |
| 2003 | 112 | 127 |
| 2004 | 120 | 141 |
| 2005 | 80 | 152 |
| 2006 | 117 | 145 |
| 2007 | 96 | 139 |
| 2008 | 115 | 157 |
| 2009 | 111 | 160 |
| 2010 | 175 | 214 |
| 2011 | 153 | 192 |
| 2012 | 140 | 198 |
| 2013 | 203 | 210 |
| 2014 | 142 | 210 |
| 2015 | 205 | 279 |
| 2016 | 205 | 284 |
| 2017 | 197 | 254 |
| 2018 | 180 | 267 |
| 2019 | 188 | 243 |
| 2020 | 180 | 212 |
| 2021 | 164 | 176 |
| 2022 | 143 | 149 |
| 2023 | 134 | 173 |
| 2024 | 134 | 117 |
| 2025 | 114 | 113 |
| 2026 | 90 | 78 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09K 19/06Non-steroidal liquid crystal compounds4,503
- C09K 2019/0444Characterized by a linking chain between rings or ring systems, a bridgingIndexing code1,995
- C09K 19/38Polymers1,492
- C09K 19/42Mixtures of liquid crystal compounds covered by two or more of the1,351
- C09K 19/40Containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen or sulfur422
- C09K 19/0403The structure containing one or more specific, optionally substituted ring or ring380
- C09K 2019/0425Characterized by a specific unit that results in a functional effectIndexing code140
- C09K 19/36Steroidal liquid crystal compounds112
Recent patents
- Liquid crystal medium and electronic component6 Oct 2026US 12,753,345 B2Merck Patent GmbH
- Liquid crystal scaffolds and use thereof for organoid, spheroid, and 3D cellaggregate manufacturing6 Oct 2026US 12,753,393 B2The Regents of the University of California
- Liquid crystal compounds29 Sep 2026US 12,747,392 B2Rolic Technologies AG
- Liquid crystal composition and display panel29 Sep 2026US 12,747,393 B2Tcl China Star Optoelectronics Technology Co., Ltd.
- All-aromatic liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom15 Sep 2026US 12,734,747 B2The United States of America as represented by the Secretary of the Air Force
- Resin composition, film, metal-clad laminate, and circuit board8 Oct 2026US 2026/0308452 A1Kuraray Co., Ltd.
- Polymerizable liquid crystal composition8 Oct 2026US 2026/0308453 A1Rolic Technologies AG
- Method for producing cholesteric liquid crystal layer, cholesteric liquid crystal layer, liquid crystal composition, cured product, optically anisotropic body, and reflective layer1 Oct 2026US 2026/0299363 A1FUJIFILM Corporation
- Chiral reactive mesogen mixture24 Sep 2026US 2026/0286221 A1Merck Patent GmbH
- Chiral photosensitive molecular switch, cholesteric liquid crystal composition, display panel and preparation method thereof24 Sep 2026US 2026/0286222 A1Beijing Boe Optoelectronics Technology Co., Ltd.
Most cited
By later US patents
- Process for producing anisotropic liquid crystal layers on a substrate244US 5,247,377 ARohm GmbH Chemische Fabrik · 1993
- Light modulating materials comprising a liquid crystal phase dispersed in a birefringent polymeric phase231US 4,994,204 AKent State University · 1991
- Liquid crystalline material and display cell containing said material204US 5,188,760 AU. S. Philips Corporation · 1993
- Liquid crystal composition and liquid crystal display device182US 8,361,569 B2Jnc Corporation · 2013
- Solidified liquid crystals of cellulose with optically variable properties178US 5,629,055 APulp and Paper Research Institute of Canada · 1997