B01J 31/24

Phosphines , i.e. phosphorus bonded to only carbon atoms, or to both

Official title: Phosphines {, i.e. phosphorus bonded to only carbon atoms, or to both carbon and hydrogen atoms, including e.g. sp2-hybridised phosphorus compounds such as phosphabenzene, phosphole or anionic phospholide ligands}

B01J31/24 (Phosphines , i.e. phosphorus bonded to only carbon atoms, or to both) appears on 1,961 US grants and 1,409 published applications in this corpus.

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Granted patents: 1,961
Published applications: 1,409
Assignees: 729
Inventors: 4,013
Latest grant: 15 Sep 2026

Filings by year

B01J 31/24: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	43	0
1977	22	0
1978	28	0
1979	23	0
1980	27	0
1981	41	0
1982	32	0
1983	25	0
1984	26	0
1985	40	0
1986	17	0
1987	19	0
1988	11	0
1989	26	0
1990	23	0
1991	25	0
1992	37	0
1993	51	0
1994	33	0
1995	26	0
1996	33	0
1997	32	0
1998	53	0
1999	52	0
2000	54	0
2001	53	10
2002	36	37
2003	59	66
2004	49	65
2005	37	65
2006	35	44
2007	40	47
2008	23	36
2009	31	38
2010	39	48
2011	26	41
2012	21	34
2013	37	53
2014	43	51
2015	58	74
2016	62	83
2017	72	62
2018	46	67
2019	78	82
2020	64	47
2021	46	69
2022	44	69
2023	53	75
2024	49	67
2025	35	50
2026	26	29

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

Phosphines , i.e. phosphorus bonded to only carbon atoms, or to both

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