C09B 31/30

Disazo and polyazo dyes of the type a->b->c, a->b->c->d, or the like

Official title: Other polyazo dyes

C09B31/30 (Disazo and polyazo dyes of the type a->b->c, a->b->c->d, or the like) appears on 31 US grants and 33 published applications in this corpus.

Search patents in C09B

Granted patents: 31
Published applications: 33
Assignees: 11
Inventors: 75
Latest grant: 22 Oct 2024

Filings by year

C09B 31/30: granted patents and published applications per publication year
Year	Granted patents	Published applications
1987	1	0
1988	0	0
1989	0	0
1990	0	0
1991	0	0
1992	0	0
1993	0	0
1994	0	0
1995	0	0
1996	0	0
1997	2	0
1998	0	0
1999	0	0
2000	0	0
2001	0	0
2002	0	0
2003	0	0
2004	1	0
2005	0	1
2006	1	1
2007	0	0
2008	0	1
2009	1	1
2010	1	2
2011	0	3
2012	1	0
2013	2	7
2014	4	2
2015	2	2
2016	6	6
2017	1	2
2018	4	2
2019	2	0
2020	0	1
2021	0	0
2022	0	2
2023	0	0
2024	2	0

By publication year. Applications have been published since 2001.

Recent patents

Dichroic azo-azomethine dyes for liquid crystal compositions22 Oct 2024US 12,122,919 B2BASF SE
Azo compound or salt thereof, and dye-based polarizing film and dye-based polarizing plate containing same24 Sep 2024US 12,098,287 B2Nippon Kayaku Kabushiki Kaisha
Azo compound, ink composition, ink jet recording method, and colored article18 Jun 2019US 10,323,150 B2Nippon Kayaku Kabushiki Kaisha
Coloring composition, anisotropic light absorption film, laminate, polarizing plate, image display device and compound7 May 2019US 10,280,181 B2FUJIFILM Corporation
Azo compound, dye-based polarizing film containing same, and polarizing plate11 Dec 2018US 10,150,871 B2Nippon Kayaku Kabushiki Kaisha

Most cited

By later US patents