C09K 19/588
Heterocyclic compounds
Official title: {Heterocyclic compounds}
C09K19/588 (Heterocyclic compounds) appears on 269 US grants and 210 published applications in this corpus.
Search patents in C09K- Granted patents
- 269
- Published applications
- 210
- Assignees
- 87
- Inventors
- 570
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 5 | 0 |
| 1994 | 14 | 0 |
| 1995 | 13 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 3 |
| 2003 | 6 | 9 |
| 2004 | 8 | 7 |
| 2005 | 7 | 6 |
| 2006 | 4 | 5 |
| 2007 | 3 | 6 |
| 2008 | 6 | 5 |
| 2009 | 4 | 10 |
| 2010 | 8 | 9 |
| 2011 | 8 | 15 |
| 2012 | 6 | 13 |
| 2013 | 18 | 14 |
| 2014 | 13 | 9 |
| 2015 | 8 | 22 |
| 2016 | 7 | 16 |
| 2017 | 23 | 15 |
| 2018 | 9 | 12 |
| 2019 | 7 | 4 |
| 2020 | 9 | 5 |
| 2021 | 4 | 2 |
| 2022 | 4 | 8 |
| 2023 | 6 | 6 |
| 2024 | 2 | 5 |
| 2025 | 1 | 1 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Liquid-crystal media and PNLC light modulation element23 Jun 2026US 12,662,632 B2Merck Patent GmbH
- Polymerizable liquid crystal material and polymerized liquid crystal film2 Jun 2026US 12,644,050 B2Merck Patent GmbH
- Compound, composition, cured product, optically anisotropic body, optical element, and light guide element17 Mar 2026US 12,577,469 B2FUJIFILM Corporation
- Liquid crystal composition, preparation method of the same, and display panel20 Jan 2026US 12,528,989 B2Beijing Boe Optoelectronics Technology Co., Ltd.
- Chiral reactive mesogen mixture24 Sep 2026US 2026/0286221 A1Merck Patent GmbH
- Liquid crystal composition and light modulating device thereof13 Aug 2026US 2026/0234471 A1TD Electrooptic Films (TDEF) Inc.
- Aromatic amine compound, liquid crystal composition, liquid crystal element, display apparatus, and light control apparatus2 Oct 2025US 2025/0304857 A1Murata Manufacturing Co., Ltd.
- Flexoelectric Liquid Crystal Composition, Liquid Crystal Element, Laser Inspection System, and Method for Analyzing Test Subject17 Oct 2024US 2024/0345033 A1Tokyo University of Science Foundation
- Liquid crystal composition and bistable liquid crystal dimming device applying same26 Sep 2024US 2024/0318081 A1Smart Liquid Crystal Technology Co., Ltd.
Most cited
By later US patents
- Chiral dopants104US 6,217,792 B1Merck Patent GmbH · 2001
- Chiral additives for cholesteric displays87US 6,830,789 B2Kent Displays Incorporated · 2004
- Identification and authentication using liquid crystal material markings44US 8,734,679 B2Sicpa Holding SA · 2014
- 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