C09B 56/04
Stilbene-azo dyes
Official title: Stilbene-azo dyes {(disazo dyes from diaminostilbene, C09B35/215)}
C09B56/04 (Stilbene-azo dyes) appears on 58 US grants and 23 published applications in this corpus.
Search patents in C09B- Granted patents
- 58
- Published applications
- 23
- Assignees
- 28
- Inventors
- 126
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 2 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 2 | 1 |
| 2013 | 0 | 3 |
| 2014 | 4 | 5 |
| 2015 | 2 | 0 |
| 2016 | 2 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Reactive navy to black dye composition and dye product thereof6 Jan 2026US 12,516,194 B2Shanghai Kehua Dyestuff Industry Co., Ltd.
- Achromatic dye-based polarization element, and polarization plate26 Feb 2019US 10,215,902 B2Nippon Kayaku Kabushiki Kaisha
- Polarizing film, display device and production process thereof14 Aug 2018US 10,047,294 B2FUJIFILM Corporation
- Polarizing film, display device and production process thereof5 Jul 2016US 9,382,481 B2FUJIFILM Corporation
- Synthesis method for self-dispersible pigment, self-dispersible pigment, ink jet ink, ink cartridge, and ink jet recording method16 Feb 2016US 9,260,611 B2Canon Kabushiki Kaisha
- A reactive navy to black dye composition and dye product thereof4 Jan 2024US 2024/0002669 A1Shanghai Kehua Dyestuff Industry Co., Ltd.
- Polarizing film, display device and production process thereof29 Sep 2016US 2016/0280999 A1FUJIFILM Corporation
- Achromatic Dye-Based Polarization Element, And Polarization Plate18 Feb 2016US 2016/0047959 A1Nippon Kayaku Kabushiki Kaisha
- Polarizer And Polarizing Plate7 Aug 2014US 2014/0218628 A1Nippon Kayaku Kabushiki Kaisha
- Polarizing Element And Polarizing Plate7 Aug 2014US 2014/0218666 A1Nippon Kayaku Kabushiki Kaisha
Most cited
By later US patents
- Stilbene dyestuffs and light-polarizing films or sheets containing stilbene39US 5,272,259 ABayer Aktiengesellschaft · 1993
- Light-polarizing films or sheets containing stilbene dyestuffs35US 5,007,942 ABayer Aktiengesellschaft · 1991
- Optically clear silicone compositions26US 5,077,335 ABayer Aktiengesellschaft · 1991
- Electrophotographic printing original plate and electrophotographic plate making process using the printing original plate25US 4,596,754 ARicoh Company, Ltd. · 1986
- Electrophotographic material containing disazo compounds23US 4,272,598 ARicoh Company, Ltd. · 1981