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C11D 1/146

Sulfuric acid esters

Official title: {Sulfuric acid esters}

C11D1/146 (Sulfuric acid esters) appears on 1,072 US grants and 1,026 published applications in this corpus.

Search patents in C11D

Granted patents: 1,072
Published applications: 1,026
Assignees: 304
Inventors: 2,520
Latest grant: 6 Oct 2026

Filings by year

C11D 1/146: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	4	0
1977	7	0
1978	6	0
1979	1	0
1980	4	0
1981	4	0
1982	3	0
1983	8	0
1984	12	0
1985	7	0
1986	6	0
1987	5	0
1988	5	0
1989	11	0
1990	2	0
1991	11	0
1992	5	0
1993	7	0
1994	11	0
1995	31	0
1996	26	0
1997	30	0
1998	60	0
1999	81	0
2000	52	0
2001	53	11
2002	34	26
2003	48	50
2004	41	39
2005	15	29
2006	16	25
2007	16	23
2008	2	24
2009	18	19
2010	21	36
2011	22	20
2012	15	13
2013	10	17
2014	13	25
2015	9	29
2016	16	42
2017	20	48
2018	23	68
2019	30	57
2020	36	63
2021	35	48
2022	36	57
2023	42	73
2024	39	63
2025	37	72
2026	26	49

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Recent patents

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Most cited

By later US patents