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D06P 1/40

Using acid dyes without azo groups

Official title: using acid dyes without azo groups

D06P1/40 (Using acid dyes without azo groups) appears on 22 US grants and 10 published applications in this corpus.

Search patents in D06P

Granted patents: 22
Published applications: 10
Assignees: 20
Inventors: 53
Latest grant: 14 Dec 2021

Filings by year

D06P 1/40: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	2	0
1977	1	0
1978	4	0
1979	1	0
1980	3	0
1981	0	0
1982	1	0
1983	0	0
1984	0	0
1985	1	0
1986	0	0
1987	0	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	1	0
1998	0	0
1999	0	0
2000	2	0
2001	0	0
2002	0	0
2003	1	0
2004	0	0
2005	0	0
2006	0	0
2007	0	0
2008	0	0
2009	0	0
2010	0	0
2011	0	1
2012	0	1
2013	0	0
2014	0	0
2015	0	0
2016	0	0
2017	0	3
2018	0	1
2019	1	1
2020	1	2
2021	3	0
2022	0	0
2023	0	1

By publication year. Applications have been published since 2001.

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Most cited

By later US patents