C09K 19/58
Dopants or charge transfer agents
C09K19/58 (Dopants or charge transfer agents) appears on 699 US grants and 583 published applications in this corpus.
Search patents in C09K- Granted patents
- 699
- Published applications
- 583
- Assignees
- 265
- Inventors
- 1,544
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 9 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 16 | 0 |
| 1992 | 15 | 0 |
| 1993 | 20 | 0 |
| 1994 | 29 | 0 |
| 1995 | 24 | 0 |
| 1996 | 12 | 0 |
| 1997 | 15 | 0 |
| 1998 | 19 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 3 |
| 2002 | 13 | 12 |
| 2003 | 15 | 23 |
| 2004 | 23 | 22 |
| 2005 | 13 | 22 |
| 2006 | 17 | 22 |
| 2007 | 16 | 16 |
| 2008 | 14 | 15 |
| 2009 | 13 | 17 |
| 2010 | 20 | 19 |
| 2011 | 14 | 28 |
| 2012 | 16 | 23 |
| 2013 | 34 | 27 |
| 2014 | 19 | 17 |
| 2015 | 16 | 39 |
| 2016 | 22 | 32 |
| 2017 | 29 | 26 |
| 2018 | 19 | 31 |
| 2019 | 16 | 24 |
| 2020 | 21 | 25 |
| 2021 | 19 | 31 |
| 2022 | 20 | 34 |
| 2023 | 22 | 26 |
| 2024 | 24 | 15 |
| 2025 | 24 | 17 |
| 2026 | 11 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Polymerizable liquid crystal material and polymerized liquid crystal film8 Sep 2026US 12,729,341 B2Merck Patent GmbH
- 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
- Cholesteric liquid crystal film and manufacturing method thereof12 May 2026US 12,624,292 B2FUJIFILM Corporation
- Chiral reactive mesogen mixture24 Sep 2026US 2026/0286221 A1Merck Patent GmbH
- Chiral photosensitive molecular switch, cholesteric liquid crystal composition, display panel and preparation method thereof24 Sep 2026US 2026/0286222 A1Beijing Boe Optoelectronics Technology Co., Ltd.
- Innovative photomobile polymer, method for preparing said photomobile polymer without rubbing, 3d printing method of said photomobile polymer and 3d printer to implement said 3d printing method20 Aug 2026US 2026/0241637 A1Consiglio Nazionale Delle Ricerche
- Liquid crystal composition and light modulating device thereof13 Aug 2026US 2026/0234471 A1TD Electrooptic Films (TDEF) Inc.
- Reactive mesogens with high birefringence13 Aug 2026US 2026/0234472 A1Merck Patent GmbH
Most cited
By later US patents
- Liquid crystalline light modulating device and material273US 5,437,811 AKent State University · 1995
- Polarizer device219US 5,235,443 AHoffmann-La Roche Inc. · 1993
- Liquid crystalline light modulating device and material203US 5,695,682 AKent State University · 1997
- Light control systems with a circular polarizer and a twisted nematic liquid crystal having a minimum path difference of .lambda./2195US 5,319,478 AHoffmann-La Roche Inc. · 1994
- Polymer stabilized liquid crystalline light modulating device and material191US 5,691,795 AKent State University · 1997