C09K 19/3066

In which the rings are linked by a chain containing carbon and

Official title: {in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers}

C09K19/3066 (In which the rings are linked by a chain containing carbon and) appears on 1,066 US grants and 1,030 published applications in this corpus.

Search patents in C09K

Granted patents: 1,066
Published applications: 1,030
Assignees: 166
Inventors: 1,424
Latest grant: 4 Aug 2026

Filings by year

C09K 19/3066: granted patents and published applications per publication year
Year	Granted patents	Published applications
1977	2	0
1978	1	0
1979	0	0
1980	4	0
1981	5	0
1982	7	0
1983	7	0
1984	9	0
1985	11	0
1986	9	0
1987	18	0
1988	9	0
1989	15	0
1990	10	0
1991	16	0
1992	13	0
1993	19	0
1994	10	0
1995	10	0
1996	8	0
1997	3	0
1998	16	0
1999	15	0
2000	11	0
2001	13	0
2002	18	15
2003	19	24
2004	25	29
2005	18	17
2006	18	15
2007	13	18
2008	11	24
2009	18	24
2010	24	30
2011	26	44
2012	23	31
2013	43	39
2014	26	43
2015	41	97
2016	69	113
2017	60	101
2018	66	95
2019	73	75
2020	59	63
2021	54	35
2022	38	28
2023	27	27
2024	24	12
2025	16	18
2026	16	13

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

Subgroups

Granted patents

C09K 19/3068Chain containing -coo- or -oco- groups723

Recent patents

Most cited

By later US patents