C09K 19/52
Liquid crystal materials: characterised by components which are not liquid crystals
Official title: characterised by components which are not liquid crystals, e.g. additives {with special physical aspect: solvents, solid particles}
C09K19/52 (Liquid crystal materials: characterised by components which are not liquid crystals) appears on 3,029 US grants and 2,870 published applications in this corpus.
Search patents in C09K- Granted patents
- 3,029
- Published applications
- 2,870
- Assignees
- 757
- Inventors
- 4,789
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 31 | 0 |
| 1977 | 16 | 0 |
| 1978 | 18 | 0 |
| 1979 | 13 | 0 |
| 1980 | 8 | 0 |
| 1981 | 19 | 0 |
| 1982 | 15 | 0 |
| 1983 | 19 | 0 |
| 1984 | 28 | 0 |
| 1985 | 20 | 0 |
| 1986 | 23 | 0 |
| 1987 | 25 | 0 |
| 1988 | 24 | 0 |
| 1989 | 31 | 0 |
| 1990 | 30 | 0 |
| 1991 | 39 | 0 |
| 1992 | 41 | 0 |
| 1993 | 53 | 0 |
| 1994 | 65 | 0 |
| 1995 | 57 | 0 |
| 1996 | 48 | 0 |
| 1997 | 50 | 0 |
| 1998 | 55 | 0 |
| 1999 | 32 | 0 |
| 2000 | 42 | 0 |
| 2001 | 35 | 11 |
| 2002 | 35 | 47 |
| 2003 | 46 | 66 |
| 2004 | 64 | 81 |
| 2005 | 41 | 75 |
| 2006 | 56 | 80 |
| 2007 | 49 | 80 |
| 2008 | 58 | 68 |
| 2009 | 55 | 68 |
| 2010 | 78 | 91 |
| 2011 | 59 | 99 |
| 2012 | 69 | 103 |
| 2013 | 90 | 123 |
| 2014 | 85 | 145 |
| 2015 | 125 | 205 |
| 2016 | 136 | 226 |
| 2017 | 144 | 191 |
| 2018 | 145 | 204 |
| 2019 | 147 | 207 |
| 2020 | 159 | 158 |
| 2021 | 133 | 123 |
| 2022 | 116 | 104 |
| 2023 | 86 | 115 |
| 2024 | 85 | 74 |
| 2025 | 82 | 78 |
| 2026 | 49 | 48 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09K 19/54Additives having no specific mesophase characterised by their chemical composition1,865
- C09K 19/58Dopants or charge transfer agents699
- C09K 19/60Pleochroic dyes565
- C09K 2019/521Inorganic solid particlesIndexing code103
- C09K 2019/528SurfactantsIndexing code98
- C09K 2019/523Organic solid particlesIndexing code40
- C09K 2019/525SolventsIndexing code32
- C09K 2019/526Gelling agentsIndexing code13
Recent patents
- Composite materials based on ferroelectric nematic liquid crystals and devices including same29 Sep 2026US 12,747,391 B2The Regents of the University of Colorado, a body corporate
- Liquid crystal composition and display panel29 Sep 2026US 12,747,393 B2Tcl China Star Optoelectronics Technology Co., Ltd.
- Liquid-crystal medium15 Sep 2026US 12,735,641 B2Merck Patent GmbH
- Optical laminate, polarizing plate, and image device display15 Sep 2026US 12,736,729 B2FUJIFILM Corporation
- Polymerizable liquid crystal material and polymerized liquid crystal film8 Sep 2026US 12,729,341 B2Merck Patent GmbH
- Polymerizable liquid crystal composition8 Oct 2026US 2026/0308453 A1Rolic Technologies AG
- Polymer dispersed liquid crystal film and method of producing the same1 Oct 2026US 2026/0299348 A1Nitto Denko Corporation
- 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
- Light modulating material comprising a liquid crystal dispersion in a plastic matrix449US 4,688,900 AKent State University · 1987
- Encapsulated liquid crystal and method389US 4,435,047 AManchester R & D Partnership · 1984
- Liquid crystalline-plastic material having submillisecond switch times and extended memory276US 4,671,618 A1987
- Liquid crystalline light modulating device and material273US 5,437,811 AKent State University · 1995
- Process of aligning and realigning liquid crystal media259US 4,974,941 AHercules Incorporated · 1990