Filings by year

C01B 39/52: granted patents and published applications per publication year
YearGranted patentsPublished applications
199910
200000
200100
200200
200300
200400
200500
200600
200700
200800
200900
201000
201102
201200
201320
201401
201500
201600
201711
201800
201911
202002
202113
202212
202321
202431

By publication year. Applications have been published since 2001.

Recent patents

Most cited

By later US patents