B01D 2255/206
Rare earth metals
B01D2255/206 (Rare earth metals) appears on 1,391 US grants and 1,817 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,391
- Published applications
- 1,817
- Assignees
- 488
- Inventors
- 3,072
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 8 | 0 |
| 1998 | 17 | 0 |
| 1999 | 12 | 0 |
| 2000 | 22 | 0 |
| 2001 | 13 | 5 |
| 2002 | 11 | 14 |
| 2003 | 12 | 19 |
| 2004 | 17 | 14 |
| 2005 | 15 | 27 |
| 2006 | 9 | 23 |
| 2007 | 12 | 50 |
| 2008 | 14 | 49 |
| 2009 | 21 | 104 |
| 2010 | 40 | 107 |
| 2011 | 49 | 84 |
| 2012 | 54 | 86 |
| 2013 | 85 | 75 |
| 2014 | 78 | 99 |
| 2015 | 80 | 121 |
| 2016 | 84 | 100 |
| 2017 | 85 | 118 |
| 2018 | 80 | 111 |
| 2019 | 90 | 97 |
| 2020 | 85 | 97 |
| 2021 | 77 | 78 |
| 2022 | 70 | 100 |
| 2023 | 65 | 89 |
| 2024 | 52 | 65 |
| 2025 | 54 | 46 |
| 2026 | 29 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Exhaust gas purification catalyst6 Oct 2026US 12,752,237 B2Cataler Corporation
- Layered tri-metallic catalytic article and method of manufacturing the catalytic article29 Sep 2026US 12,746,532 B2BASF Mobile Emissions Catalysts LLC
- Exhaust gas purification device and method for manufacturing exhaust gas purification device29 Sep 2026US 12,746,533 B2Cataler Corporation
- Selective catalytic reduction catalyst for the treatment of an exhaust gas8 Sep 2026US 12,728,409 B2BASF Mobile Emissions Catalysts LLC
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine25 Aug 2026US 12,714,990 B2Johnson Matthey Public Limited Company
- Complete oxidation catalysts for dilute alkanes1 Oct 2026US 2026/0295521 A1Icarus Technology LLC
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
- Catalyst article for treating exhaust gas, its method of manufacture and uses thereof10 Sep 2026US 2026/0264015 A1Johnson Matthey Public Limited Company
- Catalyst article for treating exhaust gas, its method of manufacture and uses thereof10 Sep 2026US 2026/0264058 A1Johnson Matthey Public Limited Company
- Exhaust gas purification catalyst composition, exhaust gas purification catalyst and exhaust gas purification system3 Sep 2026US 2026/0257173 A1Mitsui Mining & Smelting Co., Ltd.
Most cited
By later US patents
- Apparatus, method, and system for concentrating adsorbable pollutants and abatement thereof119US 6,105,365 AEngelhard Corporation · 2000
- Exhaust gas purification device for an engine103US 5,472,673 AToyota Jidosha Kabushiki Kaisha · 1995
- Catalytic wall-flow filter103US 6,753,294 B1Johnson Matthey Public Limited Company · 2004
- Catalyst for catalytic reduction of nitrogen oxide94US 5,380,692 AAgency of Industrial Science and Technology · 1995
- Thermally regenerable nitric oxide adsorbent90US 8,105,559 B2Johnson Matthey Public Limited Company · 2012