C09K 19/20

Linked by a chain containing carbon and oxygen atoms as chain links

Official title: linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers}

C09K19/20 (Linked by a chain containing carbon and oxygen atoms as chain links) appears on 1,436 US grants and 1,166 published applications in this corpus.

Search patents in C09K

Granted patents: 1,436
Published applications: 1,166
Assignees: 313
Inventors: 2,199
Latest grant: 21 Jul 2026

Filings by year

C09K 19/20: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	10	0
1977	15	0
1978	8	0
1979	6	0
1980	11	0
1981	6	0
1982	4	0
1983	3	0
1984	5	0
1985	11	0
1986	17	0
1987	26	0
1988	18	0
1989	33	0
1990	29	0
1991	35	0
1992	41	0
1993	48	0
1994	33	0
1995	26	0
1996	18	0
1997	18	0
1998	27	0
1999	28	0
2000	18	0
2001	20	2
2002	20	25
2003	29	23
2004	26	27
2005	10	22
2006	26	32
2007	17	32
2008	19	33
2009	27	35
2010	38	56
2011	41	54
2012	31	45
2013	64	49
2014	25	59
2015	60	106
2016	74	107
2017	64	83
2018	65	90
2019	61	69
2020	57	64
2021	35	34
2022	35	25
2023	36	26
2024	21	25
2025	25	26
2026	16	17

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

Subgroups

Granted patents

C09K 19/2007The chain containing -coo- or -oco- groups1,095

Recent patents

Most cited

By later US patents