B01D 71/0221
Group 4 or 5 metals
Official title: {Group 4 or 5 metals}
B01D71/0221 (Group 4 or 5 metals) appears on 115 US grants and 141 published applications in this corpus.
Search patents in B01D- Granted patents
- 115
- Published applications
- 141
- Assignees
- 120
- Inventors
- 395
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 2 |
| 2002 | 4 | 5 |
| 2003 | 4 | 4 |
| 2004 | 3 | 3 |
| 2005 | 1 | 5 |
| 2006 | 1 | 11 |
| 2007 | 2 | 9 |
| 2008 | 6 | 2 |
| 2009 | 4 | 10 |
| 2010 | 7 | 6 |
| 2011 | 5 | 1 |
| 2012 | 6 | 4 |
| 2013 | 2 | 4 |
| 2014 | 6 | 9 |
| 2015 | 5 | 9 |
| 2016 | 2 | 3 |
| 2017 | 6 | 7 |
| 2018 | 6 | 11 |
| 2019 | 7 | 6 |
| 2020 | 4 | 7 |
| 2021 | 6 | 4 |
| 2022 | 2 | 4 |
| 2023 | 3 | 1 |
| 2024 | 4 | 5 |
| 2025 | 3 | 6 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ruthenium promoter catalyst compositions15 Sep 2026US 12,735,324 B2Commonwealth Scientific and Industrial Research Organisation
- Porous medium with adjustable fluid permeability and associated systems and methods14 Jul 2026US 12,678,743 B2Massachusetts Institute of Technology
- Preparation method of organosilica/ceramic composite membrane with a gradient pore structure10 Feb 2026US 12,544,721 B2Changzhou University
- Method of joining and sealing a vanadium based membrane to a metallic connection section14 Oct 2025US 12,440,923 B2Commonwealth Scientific and Industrial Research Organisation
- Rigid self-supporting MXene separation membrane and preparation method and use thereof19 Aug 2025US 12,390,771 B2Dalian University of Technology
- Devices and methods for removing metal cations from fluids27 Aug 2026US 2026/0249252 A1City University of Hong Kong
- Composite palladium-based alloy material, preparation method therefor, and use thereof5 Feb 2026US 2026/0035769 A1China Petroleum & Chemical Corporation
- Arrangement for joining and sealing a metallic hydrogen separation membrane to a metallic connector1 Jan 2026US 2026/0001041 A1Commonwealth Scientific and Industrial Research
- Adsorptive membranes for recovery of lithium and solar-driven recycling of water from geothermal brines23 Oct 2025US 2025/0325945 A1University of Kentucky Research Foundation
- Modular Membrane Materials for Separation Systems and Methods of Use thereof28 Aug 2025US 2025/0269332 A1Temple University of the Commonwealth System of Higher Education
Most cited
By later US patents
- Steam reformer with internal hydrogen purification269US 5,997,594 ANorthwest Power Systems, LLC · 1999
- Solid multi-component membranes, electrochemical reactor components, electrochemical reactors and use of membranes, reactor components, and reactor for oxidation reactions202US 5,306,411 AThe Standard Oil Company · 1994
- Composite metal membrane175US 5,738,708 AThe Regents of the University of California Office of Technology Transfer · 1998
- Non-leaching antimicrobial films55US 6,030,632 ABioPolymerix and Surfacine Development Company · 2000
- Conductive filter laminate54US 5,527,569 AW. L. Gore & Associates, Inc. · 1996