C09K 19/3477
The heterocyclic ring being a five-membered aromatic ring containing at least one
Official title: {the heterocyclic ring being a five-membered aromatic ring containing at least one nitrogen atom}
C09K19/3477 (The heterocyclic ring being a five-membered aromatic ring containing at least one) appears on 143 US grants and 143 published applications in this corpus.
Search patents in C09K- Granted patents
- 143
- Published applications
- 143
- Assignees
- 57
- Inventors
- 374
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 3 |
| 2004 | 2 | 4 |
| 2005 | 3 | 9 |
| 2006 | 5 | 8 |
| 2007 | 5 | 7 |
| 2008 | 6 | 10 |
| 2009 | 5 | 13 |
| 2010 | 4 | 6 |
| 2011 | 9 | 1 |
| 2012 | 4 | 8 |
| 2013 | 3 | 2 |
| 2014 | 2 | 2 |
| 2015 | 4 | 5 |
| 2016 | 7 | 11 |
| 2017 | 6 | 9 |
| 2018 | 7 | 9 |
| 2019 | 1 | 5 |
| 2020 | 7 | 6 |
| 2021 | 7 | 6 |
| 2022 | 4 | 4 |
| 2023 | 6 | 2 |
| 2024 | 5 | 4 |
| 2025 | 4 | 3 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- All-aromatic liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom15 Sep 2026US 12,734,747 B2The United States of America as represented by the Secretary of the Air Force
- All-aromatic liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom15 Sep 2026US 12,734,748 B2The United States of America as represented by the Secretary of the Air Force
- Polymerisable liquid crystal material and polymerised liquid crystal film21 Jul 2026US 12,686,820 B2Merck Patent GmbH
- 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.
- Organic solid crystals having helical structures formed using cholesteric liquid crystals22 Apr 2025US 12,282,222 B1Meta Platforms Technologies, LLC
- 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.
- Polymerizable liquid crystal formulations20 Aug 2026US 2026/0242666 A1Merck Patent GmbH
- Liquid crystal composition and liquid crystal display device16 Jul 2026US 2026/0201250 A1Jiangsu Hecheng Display Technology Co., Ltd.
- Liquid crystal medium and electronic component14 May 2026US 2026/0132337 A1Merck Patent GmbH
- Display device including a touch insulation layer and a reflection adjustment layer, electronic device, and method for manufacturing a display device29 Jan 2026US 2026/0033220 A1Samsung Display Co., Ltd.
Most cited
By later US patents
- Polymer film, phase difference film, polarizing plate, liquid crystal display device, retardation inducing agent, and merocyanine-based compound40US 8,728,591 B2FUJIFILM Corporation · 2014
- Optical compensatory sheet and liquid crystal display34US 6,380,996 B1Fuji Photo Film Co., Ltd. · 2002
- Surfactants and polymerizable surfactants based on room-temperature ionic liquids that form lyotropic liquid crystal phases with water and room-temperature ionic liquids34US 7,931,824 B2The Regents of the University of Colorado · 2011
- Mesomorphic compound, ferroelectric liquid crystal composition containing same and ferroelectric liquid crystal device28US 5,034,151 ACanon Kabushiki Kaisha · 1991
- Perylenetetracarboxylic acid dibenzimidazole sulfoderivatives containing oxo-groups in the perylene core which form part of a para-quinoid system of bonds, lyotropic liquid crystal systems and anisotropic films containing the same, and methods for making the same27US 7,025,900 B2Nitto Denko Corporation · 2006