Filings by year

C02F 1/4672: granted patents and published applications per publication year
YearGranted patentsPublished applications
1976160
1977190
1978200
1979120
1980110
1981180
1982160
1983130
198490
1985140
198690
1987120
1988120
198990
199070
1991130
199280
1993130
1994230
1995260
1996120
1997250
1998340
1999420
2000340
2001569
20023039
20033365
20043753
20052250
20062249
20072642
20081753
20092166
20103360
20112687
20124272
20134880
20143986
20155282
20165278
20173481
20186984
20196884
202058104
20216898
202265112
202369102
20246289
202579105
20264666

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