C09K 19/3405
The heterocyclic ring being a five-membered ring
Official title: {the heterocyclic ring being a five-membered ring}
C09K19/3405 (The heterocyclic ring being a five-membered ring) appears on 325 US grants and 367 published applications in this corpus.
Search patents in C09K- Granted patents
- 325
- Published applications
- 367
- Assignees
- 83
- Inventors
- 718
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 2 |
| 2003 | 0 | 5 |
| 2004 | 3 | 9 |
| 2005 | 9 | 13 |
| 2006 | 10 | 13 |
| 2007 | 6 | 13 |
| 2008 | 12 | 11 |
| 2009 | 7 | 11 |
| 2010 | 9 | 11 |
| 2011 | 11 | 12 |
| 2012 | 10 | 9 |
| 2013 | 12 | 10 |
| 2014 | 10 | 12 |
| 2015 | 10 | 17 |
| 2016 | 12 | 22 |
| 2017 | 9 | 19 |
| 2018 | 13 | 32 |
| 2019 | 15 | 31 |
| 2020 | 15 | 21 |
| 2021 | 22 | 21 |
| 2022 | 32 | 17 |
| 2023 | 18 | 23 |
| 2024 | 23 | 4 |
| 2025 | 6 | 14 |
| 2026 | 10 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element28 Jul 2026US 12,692,440 B2Nissan Chemical Corporation
- Nonlinear optical chromophores having tetrahydrocarbazole donor groups, lyotropic compositions containing the same, and methods of poling such compositions30 Jun 2026US 12,668,743 B2Lightwave Logic, Inc.
- Liquid crystal compositions and display panels using the same23 Jun 2026US 12,662,629 B2Tcl China Star Optoelectronics Technology Co., Ltd.
- Liquid crystal composition and liquid display device23 Jun 2026US 12,662,631 B2Jiangsu Hecheng Display Technology Co., Ltd.
- Method for reducing white flicker12 May 2026US 12,624,290 B2Merck Patent GmbH
- Nonlinear Optical Chromophores Having Tetrahydrocarbazole Donor Groups, Lyotropic Compositions Containing the Same, and Methods of Poling Such Compositions24 Sep 2026US 2026/0286223 A1Lightwave Logic, Inc.
- Liquid crystal composition and use thereof17 Sep 2026US 2026/0275193 A1Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Liquid crystalline medium and compounds20 Aug 2026US 2026/0242665 A1Merck Patent GmbH
- Polymerizable liquid crystal formulations20 Aug 2026US 2026/0242666 A1Merck Patent GmbH
- Liquid-crystalline medium30 Jul 2026US 2026/0218049 A1Merck Patent GmbH
Most cited
By later US patents
- Polymerizable, chiral compounds and their use70US 5,780,629 ABASF SE · 1998
- Polymerizable liquid-crystalline compounds47US 6,136,225 ABASF SE · 2000
- Polymerizable, chiral compounds and their use37US 5,886,242 ABASF SE · 1999
- Ferroelectric liquid crystal composition and liquid crystal device using the same36US 5,308,539 ADaiso Co., Ltd. · 1994
- Polymerizable, chiral compounds, and use thereof35US 5,744,057 ABASF Aktiengesellshaft · 1998