C09K 2219/13
Used in the technical field of thermotropic switches
Official title: used in the technical field of thermotropic switches
C09K2219/13 (Used in the technical field of thermotropic switches) appears on 44 US grants and 59 published applications in this corpus.
Search patents in C09K- Granted patents
- 44
- Published applications
- 59
- Assignees
- 26
- Inventors
- 107
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 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 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 2 | 0 |
| 2013 | 0 | 3 |
| 2014 | 1 | 3 |
| 2015 | 1 | 1 |
| 2016 | 2 | 6 |
| 2017 | 2 | 2 |
| 2018 | 3 | 7 |
| 2019 | 7 | 10 |
| 2020 | 7 | 4 |
| 2021 | 4 | 4 |
| 2022 | 1 | 3 |
| 2023 | 4 | 5 |
| 2024 | 3 | 3 |
| 2025 | 2 | 3 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device for the regulation of light transmission5 May 2026US 12,619,110 B2Merck Patent GmbH
- Liquid-crystalline medium24 Mar 2026US 12,585,160 B2Merck Patent GmbH
- Temperature programmable small molecules for thermoresponsive smart windows and applications thereof3 Feb 2026US 12,540,278 B2Council of Scientific and Industrial Research
- Thermo-responsive molecules for controlled heat and light transmission windows and applications thereof19 Aug 2025US 12,391,869 B2Council of Scientific and Industrial Research
- Method for preparing a liquid crystal-based switching element22 Jul 2025US 12,365,838 B2Merck Patent GmbH
- Light control laminate, smart window including same, and automobile or building window using same28 Aug 2025US 2025/0271709 A1Dongwoo Fine-Chem Co., Ltd.
- Single-side peep-proof liquid-crystal display device14 Aug 2025US 2025/0258414 A1Jiangsu Hecheng Display Technology Co., Ltd.
- Polymer matrix with mesogenic ligand and light shutter including the same12 Jun 2025US 2025/0189840 A1Nitto Denko Corporation
- Temperature programmable small molecules for thermoresponsive smart windows and applications thereof5 Dec 2024US 2024/0400898 A1Council of Scientific and Industrial Research
- Device for the regulation of light transmission25 Apr 2024US 2024/0134218 A1Merck Patent GmbH
Most cited
By later US patents
- Novel compositions, devices and method23US 4,140,016 ABecton, Dickinson and Company · 1979
- Thermometric compositions including inert additives and products21US 3,974,317 AAshley-Butler, Inc. · 1976
- Thermally switched optical filter incorporating a guest-host architecture18US 8,284,336 B2RavenBrick LLC · 2012
- Device for controlling the passage of energy, containing a dichroic dye compound6US 10,344,217 B2Merck Patent GmbH · 2019
- Liquid-crystalline medium6US 9,701,905 B2Merck Patent GmbH · 2017