C09K 19/0208
Twisted nematic
Official title: {Twisted Nematic (T.N.); Super Twisted Nematic (S.T.N.); Optical Mode Interference (O.M.I.)}
C09K19/0208 (Twisted nematic) appears on 179 US grants and 135 published applications in this corpus.
Search patents in C09K- Granted patents
- 179
- Published applications
- 135
- Assignees
- 81
- Inventors
- 391
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 4 | 1 |
| 2002 | 7 | 5 |
| 2003 | 9 | 4 |
| 2004 | 5 | 4 |
| 2005 | 2 | 4 |
| 2006 | 6 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 2 | 2 |
| 2011 | 1 | 4 |
| 2012 | 1 | 1 |
| 2013 | 2 | 2 |
| 2014 | 0 | 1 |
| 2015 | 1 | 16 |
| 2016 | 8 | 20 |
| 2017 | 7 | 20 |
| 2018 | 12 | 13 |
| 2019 | 17 | 6 |
| 2020 | 10 | 7 |
| 2021 | 5 | 7 |
| 2022 | 3 | 7 |
| 2023 | 5 | 2 |
| 2024 | 6 | 2 |
| 2025 | 4 | 4 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Liquid-crystalline medium17 Feb 2026US 12,552,991 B2Merck Patent GmbH
- Liquid-crystal display26 Aug 2025US 12,398,325 B2Merck Patent GmbH
- Liquid crystal alignment quality and stability26 Aug 2025US 12,399,402 B2Snap Inc.
- Liquid crystal alignment quality and stability20 Nov 2025US 2025/0355300 A1Snap Inc.
- Liquid-crystalline medium24 Jul 2025US 2025/0236795 A1Merck Patent GmbH
- Twist-Bend Nematic Liquid Crystal (LC) Dimer-Based Material And Use Thereof, and LC-Based Cholesteric Heliconical (CH) Material and Use Thereof6 Feb 2025US 2025/0043182 A1East China University of Science and Technology
- Chiral Azobenzene Dopants with Increased Delta Helical Twisting Power6 Feb 2025US 2025/0043185 A1Nissan North America, Inc.
- Liquid crystal alignment quality and stability12 Dec 2024US 2024/0411183 A1Snap Inc.
Most cited
By later US patents
- Multistable chiral nematic displays183US 5,453,863 AKent State University · 1995
- Dual frequency switchable cholesteric liquid crystal light shutter and driving waveform104US 5,877,826 AKent State University · 1999
- Liquid crystal display device for colored display of information with a selective polarizer79US 4,025,164 ABBC Brown, Boveri & Company, Limited · 1977
- Taillight apparatus and method of making64US 6,902,307 B2Illume, L.L.C. · 2005
- Liquid crystal composition comprising liquid crystal molecules and alignment promoter61US 6,338,808 B12002