C09K 19/02
Liquid crystal materials: characterised by optical, electrical or physical properties of the
Official title: characterised by optical, electrical or physical properties of the components, in general
C09K19/02 (Liquid crystal materials: characterised by optical, electrical or physical properties of the) appears on 945 US grants and 707 published applications in this corpus.
Search patents in C09K- Granted patents
- 945
- Published applications
- 707
- Assignees
- 346
- Inventors
- 1,863
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 10 | 0 |
| 1989 | 15 | 0 |
| 1990 | 11 | 0 |
| 1991 | 7 | 0 |
| 1992 | 17 | 0 |
| 1993 | 23 | 0 |
| 1994 | 39 | 0 |
| 1995 | 34 | 0 |
| 1996 | 28 | 0 |
| 1997 | 31 | 0 |
| 1998 | 31 | 0 |
| 1999 | 32 | 0 |
| 2000 | 33 | 0 |
| 2001 | 29 | 4 |
| 2002 | 22 | 17 |
| 2003 | 24 | 17 |
| 2004 | 17 | 24 |
| 2005 | 16 | 37 |
| 2006 | 21 | 30 |
| 2007 | 17 | 24 |
| 2008 | 16 | 12 |
| 2009 | 27 | 25 |
| 2010 | 20 | 30 |
| 2011 | 19 | 28 |
| 2012 | 18 | 24 |
| 2013 | 32 | 57 |
| 2014 | 21 | 20 |
| 2015 | 36 | 63 |
| 2016 | 36 | 58 |
| 2017 | 41 | 47 |
| 2018 | 33 | 39 |
| 2019 | 40 | 28 |
| 2020 | 24 | 26 |
| 2021 | 20 | 24 |
| 2022 | 17 | 16 |
| 2023 | 19 | 15 |
| 2024 | 17 | 22 |
| 2025 | 16 | 15 |
| 2026 | 14 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09K 19/0225Ferroelectric234
- C09K 19/0208Twisted nematic179
- C09K 19/0266Antiferroelectrics96
- C09K 19/0275Blue phase90
- C09K 19/0216Super birefringence effect63
- C09K 19/0258Flexoelectric26
- C09K 19/0233Electroclinic9
- C09K 19/025Ferronematic4
All 11 subgroupsShow fewer
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
- Methods for forming auxetic, zero, and near-zero Poisson's ratio materials and materials formed thereby8 Sep 2026US 12,728,589 B2University of South Carolina
- Liquid-crystal medium28 Jul 2026US 12,692,441 B2Merck Patent GmbH
- Twist-bend nematic liquid crystal (LC) dimer-based material and use thereof, and LC-based cholesteric heliconical (CH) material and use thereof21 Jul 2026US 12,686,821 B2East China University of Science and Technology
- Flexoelectric liquid crystal composition, liquid crystal element, laser inspection system, and method for analyzing test subject30 Jun 2026US 12,669,482 B2Tokyo University of Science Foundation
- Chiral photosensitive molecular switch, cholesteric liquid crystal composition, display panel and preparation method thereof24 Sep 2026US 2026/0286222 A1Beijing Boe Optoelectronics Technology Co., Ltd.
- Compound, and Preparation Method and Use Thereof10 Sep 2026US 2026/0265606 A1Huawei Technologies Co., Ltd.
- Liquid crystal composition, optically anisotropic layer, optical film, polarizing plate, and image display device19 Feb 2026US 2026/0049245 A1FUJIFILM Corporation
- Multi-color variable transmission optical device12 Feb 2026US 2026/0044043 A1Alphamicron Incorporated
- Anisotropic thermally conductive polymers with dynamic molecular weight, and methods of making the same8 Jan 2026US 2026/0008959 A1HRL Laboratories, LLC
Most cited
By later US patents
- Chiral smectic C or H liquid crystal electro-optical device483US 4,367,924 A1983
- Liquid crystalline light modulating device and material273US 5,437,811 AKent State University · 1995
- Polarizer device219US 5,235,443 AHoffmann-La Roche Inc. · 1993
- Liquid crystalline light modulating device and material203US 5,695,682 AKent State University · 1997
- Light control systems with a circular polarizer and a twisted nematic liquid crystal having a minimum path difference of .lambda./2195US 5,319,478 AHoffmann-La Roche Inc. · 1994