C09K 19/582
Electrically active dopants
Official title: {Electrically active dopants, e.g. charge transfer agents}
C09K19/582 (Electrically active dopants) appears on 89 US grants and 56 published applications in this corpus.
Search patents in C09K- Granted patents
- 89
- Published applications
- 56
- Assignees
- 72
- Inventors
- 269
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 2 | 1 |
| 2004 | 1 | 5 |
| 2005 | 1 | 8 |
| 2006 | 3 | 3 |
| 2007 | 4 | 1 |
| 2008 | 1 | 2 |
| 2009 | 2 | 1 |
| 2010 | 3 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 2 |
| 2013 | 2 | 1 |
| 2014 | 0 | 1 |
| 2015 | 3 | 3 |
| 2016 | 4 | 4 |
| 2017 | 1 | 3 |
| 2018 | 3 | 1 |
| 2019 | 0 | 3 |
| 2020 | 2 | 1 |
| 2021 | 5 | 5 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 2 | 3 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical dimming devices with chiral ferroelectric nematic liquid crystal9 Dec 2025US 12,493,220 B2Meta Platforms Technologies, LLC
- Perpendicularly aligned liquid crystal cured film and laminate including same8 Oct 2024US 12,110,439 B2Sumitomo Chemical Company, Limited
- Electrically tunable reflection color of chiral ferroelectric nematic liquid crystals13 Aug 2024US 12,060,515 B2Kent State University
- Use of zwitterion dopant in preparation of dynamic-scattering-mode-based liquid crystal material22 Nov 2022US 11,505,745 B2Academy of Shenzhen Guohua Optoelectronics
- Optically configurable charge-transfer materials and methods thereof11 Jan 2022US 11,222,249 B2National Technology & Engineering Solutions of Sandia, LLC
- Liquid crystals switchable stack, liquid crystals mixture, and system with liquid crystals switchable stack30 Jul 2026US 2026/0219542 A1
- Patterned coatable thin-film polarizer based on lyotropic liquid crystal26 Sep 2024US 2024/0319424 A1
- Electrically Tunable Reflection Color Of Chiral Ferroelectric Nematic Liquid Crystals4 Apr 2024US 2024/0110100 A1Kent State University
- Optical dimming devices with chiral ferroelectric nematic liquid crystal21 Mar 2024US 2024/0094584 A1Meta Platforms Technologies, LLC
- Organic electroluminescent display device16 Jun 2022US 2022/0190303 A1FUJIFILM Corporation
Most cited
By later US patents
- Nematic liquid crystal displays for low voltage direct current operation33US 4,005,928 ATexas Instruments Incorporated · 1977
- Dopants for dynamic scattering liquid crystals32US 4,066,569 AHughes Aircraft Company · 1978
- Liquid-crystalline ionic conductor and method for producing the same32US 7,166,238 B2Japan Science and Technology Corporation · 2007
- Antistatic liquid crystalline polymer composition32US 9,284,435 B2Ticona LLC · 2016
- Electro-optical display device25US 4,027,950 AMatsushita Electric Industrial Co., Ltd. · 1977