C09K 19/22
Linked by a chain containing carbon and nitrogen atoms as chain links
Official title: linked by a chain containing carbon and nitrogen atoms as chain links, e.g. Schiff bases
C09K19/22 (Linked by a chain containing carbon and nitrogen atoms as chain links) appears on 131 US grants and 86 published applications in this corpus.
Search patents in C09K- Granted patents
- 131
- Published applications
- 86
- Assignees
- 88
- Inventors
- 359
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 2 | 2 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 3 |
| 2009 | 1 | 4 |
| 2010 | 3 | 5 |
| 2011 | 4 | 2 |
| 2012 | 1 | 1 |
| 2013 | 3 | 17 |
| 2014 | 8 | 6 |
| 2015 | 9 | 5 |
| 2016 | 6 | 1 |
| 2017 | 1 | 4 |
| 2018 | 1 | 7 |
| 2019 | 1 | 4 |
| 2020 | 6 | 3 |
| 2021 | 1 | 3 |
| 2022 | 1 | 0 |
| 2023 | 5 | 6 |
| 2024 | 3 | 4 |
| 2025 | 3 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Light absorption anisotropic layer, optical film, viewing angle control system, and image display device6 Jan 2026US 12,516,244 B2FUJIFILM Corporation
- Compound, liquid crystal composition, as well as liquid crystal display element, sensor, liquid crystal lens, optical communication equipment, and antenna each using the same2 Dec 2025US 12,486,457 B2DIC Corporation
- Compound, liquid crystal composition, and liquid crystal display element, sensor, liquid crystal lens, optical communication device, and antenna using liquid crystal composition18 Nov 2025US 12,473,492 B2DIC Corporation
- Organic solid crystals having helical structures formed using cholesteric liquid crystals22 Apr 2025US 12,282,222 B1Meta Platforms Technologies, LLC
- Light color conversion material and light color conversion ink11 Jun 2024US 12,006,461 B2Industrial Technology Research Institute
- Compound, liquid crystal composition, and liquid crystal display element, sensor, liquid crystal lens, optical communication equipment, and antenna using same11 Dec 2025US 2025/0377570 A1DIC Corporation
- Structures for physical unclonable function using spontaneous chiral symmetry breaking and method of preparing the same2 Jan 2025US 2025/0002787 A1
- Compound, liquid crystal composition, and liquid crystal display element, sensor, liquid crystal lens, optical communication device, and antenna using liquid crystal composition10 Oct 2024US 2024/0336843 A1DIC Corporation
- Compound, liquid crystal composition, as well as liquid crystal display element, sensor, liquid crystal lens, optical communication equipment, and antenna each using the same11 Jul 2024US 2024/0228878 A1DIC Corporation
- Compound, composition, cured product, optically anisotropic body, optical element, and light guide element6 Jun 2024US 2024/0182785 A1FUJIFILM Corporation
Most cited
By later US patents
- Ferroelectric liquid crystal compounds and liquid crystal compositions112US 4,576,732 AHitachi, Ltd. · 1986
- Liquid crystal materials90US 3,965,029 AKent State University · 1976
- Fluorine-containing chiral smectic liquid crystals65US 4,886,619 AMinnesota Mining and Manufacturing Company · 1989
- Photo cross-linkable liquid crystals51US 5,567,349 AHoffmann-La Roche Inc. · 1996
- Optical modulation element with surface parallel and unidirectional alignment of LC45US 4,586,791 AHitachi, Ltd. · 1986