C09B 29/28
Amino naphthols
C09B29/28 (Amino naphthols) appears on 121 US grants and 34 published applications in this corpus.
Search patents in C09B- Granted patents
- 121
- Published applications
- 34
- Assignees
- 53
- Inventors
- 235
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 10 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 8 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 3 |
| 2003 | 3 | 4 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 2 | 3 |
| 2009 | 2 | 3 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 2 | 2 |
| 2013 | 2 | 0 |
| 2014 | 1 | 3 |
| 2015 | 2 | 1 |
| 2016 | 1 | 2 |
| 2017 | 2 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Mixture of reactive dyes and their use for the dyeing or printing of textile fibre materials21 Oct 2025US 12,448,519 B2Archroma (Switzerland) GmbH
- Chemical conjugates of Evans Blue derivatives and their use as radiotherapy and imaging agents for targeting prostate cancer10 Dec 2024US 12,161,733 B2The United States of America, as represented by the Secretary, Department of Health and Human Services
- Kit for diagnosing infection with Methicillin-resistant Staphylococcus aureus (MRSA) by detecting magnesium ions6 Dec 2022US 11,519,017 B2
- Ink and printing method30 Nov 2021US 11,186,737 B2Ricoh Company, Ltd.
- Chemical conjugates of Evans Blue derivatives and their use in the production of long-acting therapeutics14 Jul 2020US 10,709,790 B2The United States of America, as represented by the Secretary, Department of Health and Human Services
- Mixture Of Reactive Dyes And Their Use For The Dyeing Or Printing Of Textile Fibre Materials1 Jun 2023US 2023/0167304 A1Archroma (Switzerland) GmbH
- Kit for diagnosing infection with methicillin-resistant staphylococcus aureus (mrsa) by detecting magnesium ions18 Nov 2021US 2021/0355521 A1Bioacts Corporation
- Chemical conjugates of evans blue derivatives and their use as radiotherapy and imaging agents for targeting prostate cancer14 Jan 2021US 2021/0008232 A1The United States of America, as represented by the Secretary, Department of Health and Human Servic
- Ink and printing method10 Dec 2020US 2020/0385592 A1Ricoh Company, Ltd.
- Chemical conjugates of evans blue derivatives and their use in the production of long-acting therapeutics4 Jul 2019US 2019/0201537 A1The United States of America, as Represented by th e Secretary,Department of Health and Human Servic
Most cited
By later US patents
- Aqueous ink composition for ink-jet recording75US 4,631,085 ARicoh Company, Ltd. · 1986
- Solid particle dispersion filter dyes for photographic compositions59US 4,940,654 AEastman Kodak Company · 1990
- Substituted 4-nitrophenylazo-1-naphthol cyan dyes having improved light stability55US 4,524,122 AEastman Kodak Company · 1985
- Ink-jet color printing system51US 4,446,470 AFuji Photo Film Co., Ltd. · 1984
- Water-soluble triazine black dyes free from cellulose reactive groups and suitable for use in inks40US 4,703,113 AImperial Chemical Industries PLC · 1987