Filings by year

C04B 2235/54: granted patents and published applications per publication year
YearGranted patentsPublished applications
197660
197730
197880
197980
198050
1981100
198220
198360
198440
198550
1986120
198760
1988110
1989130
1990220
1991180
1992330
1993360
1994280
1995310
1996290
1997400
1998190
1999400
2000420
20014314
20024078
200380166
200494224
200588219
2006131253
2007136271
2008128268
2009164371
2010207382
2011230312
2012232330
2013263329
2014279295
2015255293
2016252275
2017270275
2018227308
2019232330
2020220323
2021232332
2022232317
2023222316
2024201309
2025230219
2026158163

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