C09K 19/3494
The heterocyclic ring containing sulfur and oxygen atoms
Official title: {the heterocyclic ring containing sulfur and oxygen atoms}
C09K19/3494 (The heterocyclic ring containing sulfur and oxygen atoms) appears on 22 US grants and 26 published applications in this corpus.
Search patents in C09K- Granted patents
- 22
- Published applications
- 26
- Assignees
- 14
- Inventors
- 93
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 3 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 2 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 2 | 3 |
| 2018 | 1 | 5 |
| 2019 | 1 | 2 |
| 2020 | 3 | 0 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Liquid crystal composition and liquid display device23 Jun 2026US 12,662,631 B2Jiangsu Hecheng Display Technology Co., Ltd.
- Dibenzofuran and dibenzothiophene derivatives6 Jun 2023US 11,667,841 B2Merck Patent GmbH
- Polymerizable compound and optically anisotropic object1 Mar 2022US 11,261,378 B2DIC Corporation
- Optically anisotropic layer, method for producing the optically anisotropic layer, a laminate, polarizing plate, display device, liquid crystal compound, method for producing the liquid crystal compound, and carboxylic acid compound27 Jul 2021US 11,072,741 B2FUJIFILM Corporation
- Optical film, method for producing optical film, and display device23 Mar 2021US 10,955,601 B2FUJIFILM Corporation
- Liquid crystal composition and liquid display device1 Jan 2026US 2026/0002077 A1Jiangsu Hecheng Display Technology Co., Ltd.
- Dibenzofuran and dibenzothiophene derivatives30 Dec 2021US 2021/0403810 A1Merck Patent GmbH
- Liquid crystal display device21 Nov 2019US 2019/0353962 A1Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Liquid crystal display device21 Nov 2019US 2019/0353963 A1Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Optical film, method for producing optical film, and display device13 Dec 2018US 2018/0356578 A1FUJIFILM Corporation
Most cited
By later US patents
- Alkylenedioxythiophenes and poly(alkylenedioxythiophenes) containing mesogenic groups56US 7,585,983 B2H. C. Starck GmbH · 2009
- Heteroacene compound, organic thin film comprising the compound, and electronic device comprising the thin film31US 7,816,673 B2Samsung Electronics Co., Ltd. · 2010
- Lyotropic liquid crystal systems based on perylenetetracarboxylic acid dibenzimidazole sulfoderivatives, related anisotropic films, and methods for making10US 7,160,485 B2Nitto Denko Corporation · 2007
- Optically active compounds, liquid crystal compositions comprising said compounds and liquid crystal optical modulators using said compositions9US 5,269,965 AHitachi, Ltd. · 1993
- Liquid-crystalline medium4US 6,790,489 B2Merck Patent GmbH · 2004