C09K 19/12
At least two benzene rings directly linked
Official title: at least two benzene rings directly linked, e.g. biphenyls
C09K19/12 (At least two benzene rings directly linked) appears on 1,330 US grants and 1,381 published applications in this corpus.
Search patents in C09K- Granted patents
- 1,330
- Published applications
- 1,381
- Assignees
- 260
- Inventors
- 1,786
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 21 | 0 |
| 1990 | 19 | 0 |
| 1991 | 19 | 0 |
| 1992 | 22 | 0 |
| 1993 | 32 | 0 |
| 1994 | 23 | 0 |
| 1995 | 23 | 0 |
| 1996 | 16 | 0 |
| 1997 | 12 | 0 |
| 1998 | 18 | 0 |
| 1999 | 17 | 0 |
| 2000 | 11 | 0 |
| 2001 | 15 | 5 |
| 2002 | 9 | 14 |
| 2003 | 18 | 13 |
| 2004 | 15 | 12 |
| 2005 | 8 | 12 |
| 2006 | 12 | 11 |
| 2007 | 9 | 18 |
| 2008 | 18 | 34 |
| 2009 | 17 | 45 |
| 2010 | 48 | 44 |
| 2011 | 25 | 44 |
| 2012 | 34 | 32 |
| 2013 | 44 | 56 |
| 2014 | 28 | 75 |
| 2015 | 68 | 121 |
| 2016 | 79 | 140 |
| 2017 | 82 | 117 |
| 2018 | 79 | 141 |
| 2019 | 88 | 107 |
| 2020 | 79 | 74 |
| 2021 | 66 | 61 |
| 2022 | 63 | 42 |
| 2023 | 38 | 61 |
| 2024 | 41 | 29 |
| 2025 | 35 | 41 |
| 2026 | 32 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquid crystal medium and electronic component6 Oct 2026US 12,753,345 B2Merck Patent GmbH
- Liquid crystal composition and display panel29 Sep 2026US 12,747,393 B2Tcl China Star Optoelectronics Technology Co., Ltd.
- Polymerisable liquid crystal material and polymerised liquid crystal film21 Jul 2026US 12,686,820 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 crystal device14 Jul 2026US 12,680,024 B2Merck Patent GmbH
- Liquid crystal composition and use thereof17 Sep 2026US 2026/0275193 A1Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Composite10 Sep 2026US 2026/0265608 A1University of Leeds
- Light control sheet and vehicle window27 Aug 2026US 2026/0250576 A1Toppan Holdings Inc.
- Liquid crystalline medium and compounds20 Aug 2026US 2026/0242665 A1Merck Patent GmbH
- Polymerizable liquid crystal formulations20 Aug 2026US 2026/0242666 A1Merck Patent GmbH
Most cited
By later US patents
- Liquid crystal composition and liquid crystal display device182US 8,361,569 B2Jnc Corporation · 2013
- Process of preparing compositions having multiple oriented mesogens149US 5,073,294 AHercules Incorporated · 1991
- Difluorobenzonitrile derivatives136US 5,211,878 AMerck Patent GmbH · 1993
- Liquid crystal materials and devices130US 3,947,375 ASecretary of State for Defence in Her Britannic Majesty's Govt. of U.K. of Gt. Britain and Northern Ireland · 1976
- Ferroelectric liquid crystal compounds and liquid crystal compositions112US 4,576,732 AHitachi, Ltd. · 1986