C09B 25/00
Quinophthalones
C09B25/00 (Quinophthalones) appears on 68 US grants and 30 published applications in this corpus.
Search patents in C09B- Granted patents
- 68
- Published applications
- 30
- Assignees
- 39
- Inventors
- 170
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 2 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 3 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 4 |
| 2017 | 2 | 2 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 3 | 2 |
| 2021 | 1 | 1 |
| 2022 | 0 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical device with transmission inhibition plateau in blue spectral range28 Jul 2026US 12,693,551 B2
- Liquid and solid state laser from 7H-pyrano[2,3-B:4,5-B′]diquinoline derivatives using energy transfer mechanism9 Apr 2024US 11,952,496 B1King Saud University
- Quinophthalone compound30 Nov 2021US 11,186,720 B2DIC Corporation
- Colorant, colored resin composition comprising the same, and color filter12 May 2020US 10,647,853 B2LG Display Co., Ltd.
- Coloring composition, color filter, pattern forming method, solid-state imaging device, and image display device5 May 2020US 10,641,935 B2FUJIFILM Corporation
- Optical device with transmission inhibition plateau in blue spectral range1 Oct 2026US 2026/0299319 A1ColorBoost Inc.
- Resin composition, film, optical filter, solid-state imaging element, and image display device25 May 2023US 2023/0159752 A1FUJIFILM Corporation
- Coloring composition, film, optical filter, solid-state imaging element, and image display device29 Sep 2022US 2022/0308446 A1FUJIFILM Corporation
- Optical device with transmission inhibition plateau in blue spectral range16 Jun 2022US 2022/0187628 A1Hue.Ai, LLC
- Quinophthalone compound26 Aug 2021US 2021/0261783 A1DIC Corporation
Most cited
By later US patents
- Mixed carbonate ester derivatives of quinophthalone dyes and their preparation37US 5,243,052 APolaroid Corporation · 1993
- Liquid crystal composition22US 4,588,517 AHitachi, Ltd. · 1986
- Composite pigments and process for their preparation21US 4,486,237 AMontefluous S.p.A. · 1984
- Coloration process14US 3,961,881 AImperial Chemical Industries PLC · 1976
- Process for the preparation and conditioning or organic pigments13US 4,801,702 ACiba-Geigy Corporation · 1989