C09B 35/029
Amino naphthol
C09B35/029 (Amino naphthol) appears on 13 US grants and 6 published applications in this corpus.
Search patents in C09B- Granted patents
- 13
- Published applications
- 6
- Assignees
- 10
- Inventors
- 37
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 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.
Recent patents
- Method for preparing a stable Trypan Blue solution24 Feb 2026US 12,559,629 B2Beckman Coulter, Inc.
- Use of novel naphthol AS-pigment-mixtures in printing-materials22 Sep 2020US 10,782,625 B2Clariant Plastics & Coatings Ltd
- Basic mono- and bisazo compounds27 Feb 2007US 7,183,409 B2Clariant Finance (BVI) Limited
- Disazo dyes, and copper complexes thereof, for dyeing paper18 Jul 2006US 7,078,497 B2Ciba Specialty Chemicals Corporation
- Disazo dyestuffs29 Feb 2000US 6,031,083 ABayer Aktiengesellschaft
- Compositions and methods for stable trypan blue solutions22 Feb 2024US 2024/0059898 A1Beckman Coulter, Inc.
- Conjugates of bivalent evans blue dye derivatives and methods of use20 Jan 2022US 2022/0017495 A1The United States of America, as represented by the Secretary, Department of Health and Human Servic
- Use of novel naphthol as-pigment-mixtures in printing-materials1 Nov 2018US 2018/0312704 A1Clariant Plastics & Coatings Ltd
- Disazo dyes, and copper complexes thereof, for dyeing paper12 Oct 2006US 2006/0229440 A1
- Basic mono-and bisazo compounds12 Aug 2004US 2004/0158049 A1Clariant Finance (BVI) Limited
Most cited
By later US patents
- Aqueous ink composition81US 4,711,668 ARicoh Company, Ltd. · 1987
- Naphtholazophenylazoaminonaphthol compounds and copper complexes thereof10US 4,988,805 ABayer Aktiengesellschaft · 1991
- Basic disazo compounds containing sulphonic acid groups5US 5,498,701 ASandoz Ltd. · 1996
- Amino benzophenone dye4US 5,510,468 ABASF SE · 1996
- Disazo dyestuffs4US 5,808,016 ABayer Aktiengesellschaft · 1998