C09K 19/60
Pleochroic dyes
C09K19/60 (Pleochroic dyes) appears on 565 US grants and 416 published applications in this corpus.
Search patents in C09K- Granted patents
- 565
- Published applications
- 416
- Assignees
- 186
- Inventors
- 1,050
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 5 | 0 |
| 1981 | 14 | 0 |
| 1982 | 12 | 0 |
| 1983 | 15 | 0 |
| 1984 | 21 | 0 |
| 1985 | 18 | 0 |
| 1986 | 15 | 0 |
| 1987 | 9 | 0 |
| 1988 | 9 | 0 |
| 1989 | 5 | 0 |
| 1990 | 10 | 0 |
| 1991 | 12 | 0 |
| 1992 | 11 | 0 |
| 1993 | 4 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 5 |
| 2003 | 4 | 12 |
| 2004 | 10 | 7 |
| 2005 | 5 | 15 |
| 2006 | 5 | 12 |
| 2007 | 13 | 29 |
| 2008 | 22 | 17 |
| 2009 | 10 | 13 |
| 2010 | 16 | 20 |
| 2011 | 11 | 12 |
| 2012 | 6 | 15 |
| 2013 | 15 | 10 |
| 2014 | 11 | 12 |
| 2015 | 14 | 16 |
| 2016 | 11 | 14 |
| 2017 | 13 | 28 |
| 2018 | 15 | 21 |
| 2019 | 23 | 21 |
| 2020 | 18 | 22 |
| 2021 | 19 | 17 |
| 2022 | 15 | 27 |
| 2023 | 16 | 31 |
| 2024 | 29 | 21 |
| 2025 | 22 | 12 |
| 2026 | 10 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical film, optical laminate, and image display device30 Jun 2026US 12,668,744 B2FUJIFILM Corporation
- Anthraquinone compound, liquid crystal composition containing said compound, and dimming element26 May 2026US 12,637,421 B2Nippon Kayaku Kabushiki Kaisha
- Composition for forming polarizer, polarizer, laminate, and image display device5 May 2026US 12,619,019 B2FUJIFILM Corporation
- Device for the regulation of light transmission5 May 2026US 12,619,110 B2Merck Patent GmbH
- Composition, optically anisotropic layer, liquid crystal cell, liquid crystal display device, sensor, lens, switching element, isolator, and camera21 Apr 2026US 12,606,746 B2FUJIFILM Corporation
- Polymer dispersed liquid crystal film and method of producing the same1 Oct 2026US 2026/0299348 A1Nitto Denko Corporation
- Liquid crystal composition, light absorption anisotropic film, laminate, image display device, and polymer2 Jul 2026US 2026/0184994 A1FUJIFILM Corporation
- Liquid crystal composition, optical absorption anisotropic film, method of producing optical absorption anisotropic film, optical laminate, and image display apparatus21 May 2026US 2026/0140287 A1FUJIFILM Corporation
- Liquid crystal composition for radio wave control element, and radio wave control element21 May 2026US 2026/0142380 A1FUJIFILM Corporation
- Optical filter with improved viewing angle characteristics30 Apr 2026US 2026/0118560 A1Alphamicron Incorporated
Most cited
By later US patents
- Process of aligning and realigning liquid crystal media259US 4,974,941 AHercules Incorporated · 1990
- Process for producing anisotropic liquid crystal layers on a substrate244US 5,247,377 ARohm GmbH Chemische Fabrik · 1993
- Dichroic light polarizers162US 6,049,428 AOptiva, Inc. · 2000
- Process of aligning and realigning liquid crystal media136US 5,032,009 AHercules Incorporated · 1991
- Ferroelectric liquid crystal compounds and liquid crystal compositions112US 4,576,732 AHitachi, Ltd. · 1986