C09B 31/068
Naphthols
C09B31/068 (Naphthols) appears on 49 US grants and 38 published applications in this corpus.
Search patents in C09B- Granted patents
- 49
- Published applications
- 38
- Assignees
- 25
- Inventors
- 105
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 4 |
| 2011 | 1 | 2 |
| 2012 | 2 | 8 |
| 2013 | 6 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 3 | 3 |
| 2018 | 2 | 3 |
| 2019 | 3 | 0 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compositions and methods for marking hydrocarbon compositions with non-mutagenic dyes17 Mar 2026US 12,577,484 B2United Color Manufacturing, Inc.
- Compositions and methods for marking hydrocarbon compositions with non-mutagenic dyes18 Jul 2023US 11,702,606 B2United Color Manufacturing, Inc.
- Bis-Azo colorants for use as bluing agents12 Apr 2022US 11,299,635 B2Milliken & Company
- Bis-azo colorants for use as bluing agents29 Dec 2020US 10,876,079 B2The Procter & Gamble Company
- Compositions and methods for marking hydrocarbon compositions with non-mutagenic dyes15 Sep 2020US 10,774,280 B2United Color Manufacturing, Inc.
- Polarizing plate, liquid crystal panel using same, and photofabrication apparatus16 Jul 2026US 2026/0202599 A1Nippon Kayaku Kabushiki Kaisha
- Compositions and methods for marking hydrocarbon compositions with non-mutagenic dyes12 Oct 2023US 2023/0326968 A1United Color Manufacturing, Inc.
- Compositions and Methods for Marking Hydrocarbon Compositions With Non-Mutagenic Dyes7 Jan 2021US 2021/0002570 A1United Color Manufacturing, Inc.
- Bis-Azo Colorants for Use as Bluing Agents21 Jun 2018US 2018/0171148 A1Milliken & Company
- Detailing agent for three-dimensional (3d) printing25 Jan 2018US 2018/0022923 A1Hewlett-Packard Development Company, L. P.
Most cited
By later US patents
- Boronic acid dyes23US 5,108,502 AHewlett-Packard Company · 1992
- Polyazo compound or salt thereof and dye-based polarization film containing the same17US 6,399,752 B1Sumitomo Chemical Company, Limited · 2002
- Color polarizer with support for liquid crystal projector and color liquid crystal projector16US 6,552,849 B1Nippon Kayaku Kabushiki Kaisha · 2003
- Dye type polarizing plate16US 6,790,490 B1Nippon Kayaku Kabushiki Kaisha · 2004
- Colorant for ocular lenses and material for colored ocular lenses using the colorant11US 7,232,896 B2Nidek Co., Ltd. · 2007