Filings by year

C01F 17/271: granted patents and published applications per publication year
YearGranted patentsPublished applications
197710
197810
197910
198000
198110
198200
198310
198430
198500
198610
198710
198800
198910
199020
199140
199230
199310
199410
199500
199600
199720
199800
199900
200000
200110
200200
200300
200404
200501
200625
200743
200803
200921
201013
201105
201204
201344
201475
201523
201652
201701
201814
201912
202033
202115
202232
202313
202432
202520
202601

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

Recent patents

Most cited

By later US patents