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B01D 53/8625

Nitrogen oxides

Official title: {Nitrogen oxides}

B01D53/8625 (Nitrogen oxides) appears on 1,575 US grants and 1,350 published applications in this corpus.

Search patents in B01D

Granted patents: 1,575
Published applications: 1,350
Assignees: 750
Inventors: 3,670
Latest grant: 15 Sep 2026

Filings by year

B01D 53/8625: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	10	0
1977	25	0
1978	27	0
1979	13	0
1980	15	0
1981	15	0
1982	11	0
1983	2	0
1984	8	0
1985	3	0
1986	8	0
1987	13	0
1988	40	0
1989	34	0
1990	37	0
1991	23	0
1992	39	0
1993	29	0
1994	32	0
1995	33	0
1996	25	0
1997	15	0
1998	28	0
1999	18	0
2000	35	0
2001	23	13
2002	42	36
2003	40	42
2004	27	48
2005	24	44
2006	21	36
2007	25	35
2008	28	36
2009	27	50
2010	50	62
2011	47	67
2012	38	65
2013	62	64
2014	58	71
2015	55	77
2016	45	66
2017	49	47
2018	49	77
2019	56	57
2020	51	65
2021	55	46
2022	45	63
2023	43	43
2024	29	50
2025	27	51
2026	21	39

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

Subgroups

Granted patents

Recent patents

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Nitrogen oxide removing denitrification catalyst having high durability against sulfur dioxide, method for preparing the same, and method for removing nitrogen oxide using the same8 Sep 2026US 12,728,406 B2Korea Institute of Science and Technology
Flue gas purification system for hazardous waste incineration and purification method25 Aug 2026US 12,714,969 B2Chongqing Greening Environmental Protection Co. Ltd
Process for working-up a nitrous oxide comprising off-gas stream11 Aug 2026US 12,702,951 B2BASF SE

Most cited

By later US patents