B01D 2255/2061
Yttrium
B01D2255/2061 (Yttrium) appears on 225 US grants and 292 published applications in this corpus.
Search patents in B01D- Granted patents
- 225
- Published applications
- 292
- Assignees
- 109
- Inventors
- 651
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 4 |
| 2006 | 1 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 2 |
| 2009 | 0 | 2 |
| 2010 | 2 | 4 |
| 2011 | 4 | 13 |
| 2012 | 4 | 15 |
| 2013 | 8 | 8 |
| 2014 | 11 | 20 |
| 2015 | 12 | 34 |
| 2016 | 16 | 19 |
| 2017 | 16 | 20 |
| 2018 | 16 | 22 |
| 2019 | 18 | 19 |
| 2020 | 13 | 23 |
| 2021 | 17 | 21 |
| 2022 | 14 | 16 |
| 2023 | 15 | 18 |
| 2024 | 13 | 11 |
| 2025 | 12 | 8 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Three-way conversion catalyst composition comprising platinum-rhodium bimetallic components11 Aug 2026US 12,702,968 B2BASF Mobile Emissions Catalysts LLC
- Cerium- and zirconium-based mixed oxides24 Mar 2026US 12,582,966 B2Rhodia Operations
- Emission control catalyst article with enriched PGM zone, method and apparatus to produce the same10 Mar 2026US 12,569,839 B2BASF Mobile Emissions Catalysts LLC
- Ce—Zr composite oxide and exhaust gas purification catalyst using same6 Jan 2026US 12,515,201 B2Umicore Shokubai Japan Co., Ltd.
- Rare earth element containing zeolitic material having the AEI framework type and coated monolith substrate6 Jan 2026US 12,515,206 B2BASF SE
- Improved three-way catalysts23 Jul 2026US 2026/0208106 A1
- Exhuast Gas Purification Catalyst16 Jul 2026US 2026/0199887 A1Cataler Corporation
- Double-layer three-way catalyst11 Jun 2026US 2026/0158445 A1Umicore AG & Co. KG
- Cerium- and Zirconium-Based Mixed Oxide26 Feb 2026US 2026/0054253 A1Rhodia Operation
- Two-layer, three-way catalyst with significantly improved co conversion4 Dec 2025US 2025/0367603 A1Umicore AG & Co. KG
Most cited
By later US patents
- Exhaust gas purification device for an engine103US 5,472,673 AToyota Jidosha Kabushiki Kaisha · 1995
- Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engine51US 6,161,378 AHitachi, Ltd. · 2000
- Process for elimination of hexavalent chromium compounds on metallic substrates within zero-PGM catalyst systems34US 8,969,228 B2Clean Diesel Technologies, Inc. · 2015
- Exhaust gas purifier33US 5,820,833 AIsuzu Ceramics Institute Co., Ltd. · 1998
- Apparatus for purifying exhaust waste gases31US 3,969,082 AUnited Kingdom Atomic Energy Authority · 1976