Filings by year

C08L 23/20: granted patents and published applications per publication year
YearGranted patentsPublished applications
1976160
1977160
1978280
1979160
1980140
1981120
1982170
1983100
1984160
1985100
1986140
1987230
1988220
1989180
1990270
1991290
1992240
1993270
1994330
1995210
1996280
1997260
1998260
1999330
2000280
2001385
20022732
20032346
20042956
20053137
20062039
20072033
20081744
20092545
20102368
20112557
20123952
20133442
20144355
20153556
20163158
20175350
20184965
20193059
20206185
20215172
20223858
20233831
20243739
20253424
20261719

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

Subgroups

Granted patents

Recent patents

Most cited

By later US patents