C01B 3/503
Characterised by membranes
Official title: characterised by membranes
C01B3/503 (Characterised by membranes) appears on 599 US grants and 644 published applications in this corpus.
Search patents in C01B- Granted patents
- 599
- Published applications
- 644
- Assignees
- 377
- Inventors
- 1,473
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 10 | 0 |
| 1999 | 12 | 0 |
| 2000 | 5 | 0 |
| 2001 | 16 | 4 |
| 2002 | 13 | 18 |
| 2003 | 25 | 22 |
| 2004 | 15 | 27 |
| 2005 | 8 | 33 |
| 2006 | 23 | 34 |
| 2007 | 14 | 52 |
| 2008 | 19 | 35 |
| 2009 | 22 | 38 |
| 2010 | 28 | 44 |
| 2011 | 39 | 30 |
| 2012 | 29 | 29 |
| 2013 | 27 | 34 |
| 2014 | 36 | 23 |
| 2015 | 32 | 29 |
| 2016 | 17 | 23 |
| 2017 | 18 | 18 |
| 2018 | 24 | 15 |
| 2019 | 13 | 17 |
| 2020 | 13 | 13 |
| 2021 | 16 | 16 |
| 2022 | 9 | 23 |
| 2023 | 12 | 13 |
| 2024 | 10 | 23 |
| 2025 | 16 | 21 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Gas separation membrane, and preparation method therefor and use thereof25 Aug 2026US 12,714,972 B2Changshu 3F Zhonghao New Chemical Materials Co., Ltd.
- Palladium-based membrane25 Aug 2026US 12,715,767 B2National University of Singapore
- Adiabatic multi-stage reactors for hydrogen production and related systems and methods4 Aug 2026US 12,698,204 B2Saudi Arabian Oil Company
- High selectivity and high CO2 plasticization resistant polymeric membranes for gas separations9 Jun 2026US 12,649,820 B2Uop LLC
- Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production9 Jun 2026US 12,649,959 B2Carbon Technology Holdings, LLC
- Multi-stage membrane reactor system for ammonia cracking to produce hydrogen6 Aug 2026US 2026/0225879 A1Saudi Arabian Oil Company
- Hydrogen supply and demand management device and hydrogen supply and demand administering device2 Jul 2026US 2026/0187737 A1Hitachi, Ltd.
- Selective membranes and related methods18 Jun 2026US 2026/0166478 A1Massachusetts Institute of Technology
- High selectivity and high co2 plasticization resistant polymeric membranes for gas separations18 Jun 2026US 2026/0167768 A1Uop LLC
- Multi-stage hydrogen/helium separation using hydrogen-selective membranes11 Jun 2026US 2026/0158436 A1Hydrogen Onsite, S.L.
Most cited
By later US patents
- Steam reformer with internal hydrogen purification533US 5,861,137 A1999
- Hydrogen gas-extraction module and method of fabrication341US 6,152,987 AWorcester Polytechnic Institute · 2000
- Steam reformer with internal hydrogen purification269US 5,997,594 ANorthwest Power Systems, LLC · 1999
- Hydrogen producing fuel processing system236US 6,221,117 B1IdaTech, LLC · 2001
- Composite hydrogen separation element and module185US 5,498,278 ABend Research, Inc. · 1996