C09K 19/32

Containing condensed ring systems, i.e. fused, bridged or spiro ring systems

Official title: containing condensed ring systems, i.e. fused, bridged or spiro ring systems

C09K19/32 (Containing condensed ring systems, i.e. fused, bridged or spiro ring systems) appears on 1,016 US grants and 977 published applications in this corpus.

Search patents in C09K

Granted patents: 1,016
Published applications: 977
Assignees: 217
Inventors: 1,566
Latest grant: 6 Oct 2026

Filings by year

C09K 19/32: granted patents and published applications per publication year
Year	Granted patents	Published applications
1978	2	0
1979	0	0
1980	1	0
1981	3	0
1982	3	0
1983	7	0
1984	7	0
1985	7	0
1986	13	0
1987	8	0
1988	4	0
1989	13	0
1990	8	0
1991	11	0
1992	19	0
1993	14	0
1994	20	0
1995	21	0
1996	11	0
1997	8	0
1998	16	0
1999	10	0
2000	14	0
2001	11	4
2002	12	15
2003	17	26
2004	28	29
2005	11	33
2006	30	38
2007	24	24
2008	27	38
2009	28	44
2010	44	51
2011	36	38
2012	29	35
2013	50	52
2014	31	62
2015	59	79
2016	57	70
2017	48	57
2018	44	78
2019	47	50
2020	43	39
2021	25	27
2022	30	19
2023	22	22
2024	19	15
2025	14	23
2026	10	9

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

Containing condensed ring systems, i.e. fused, bridged or spiro ring systems

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