B01D 53/9445

Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way

Official title: {Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]}

B01D53/9445 (Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way) appears on 2,401 US grants and 2,194 published applications in this corpus.

Search patents in B01D

Granted patents: 2,401
Published applications: 2,194
Assignees: 587
Inventors: 3,954
Latest grant: 6 Oct 2026

Filings by year

B01D 53/9445: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	27	0
1977	16	0
1978	25	0
1979	17	0
1980	17	0
1981	11	0
1982	7	0
1983	18	0
1984	8	0
1985	17	0
1986	11	0
1987	13	0
1988	22	0
1989	22	0
1990	30	0
1991	44	0
1992	35	0
1993	47	0
1994	40	0
1995	36	0
1996	40	0
1997	36	0
1998	56	0
1999	73	0
2000	72	0
2001	56	37
2002	49	61
2003	54	71
2004	53	76
2005	41	82
2006	39	75
2007	37	99
2008	46	96
2009	65	124
2010	82	99
2011	74	86
2012	73	80
2013	75	57
2014	74	111
2015	79	119
2016	85	100
2017	81	96
2018	68	93
2019	86	98
2020	80	108
2021	91	80
2022	66	91
2023	74	98
2024	55	75
2025	54	45
2026	24	37

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

Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way

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