B01D 2255/9027
More than three layers
B01D2255/9027 (More than three layers) appears on 23 US grants and 31 published applications in this corpus.
Search patents in B01D- Granted patents
- 23
- Published applications
- 31
- Assignees
- 21
- Inventors
- 99
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 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 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 3 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 1 | 3 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 2 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 3 |
| 2018 | 1 | 4 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 2 | 2 |
| 2022 | 0 | 1 |
| 2023 | 4 | 4 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-layer TWC formulations with optimalized PGM loadings29 Sep 2026US 12,746,510 B2Johnson Matthey Public Limited Company
- Sulfur-containing organic compound assisted metal nanoparticle synthesis for three-way catalysis application17 Feb 2026US 12,551,869 B2Johnson Matthey Public Limited Company
- Method and system for pre-purification of a feed gas stream28 Nov 2023US 11,826,703 B2Praxair Technology, Inc.
- Exhaust gas purification catalyst24 Oct 2023US 11,795,855 B2Cataler Corporation
- Sulfur-containing organic compound assisted metal nanoparticle synthesis for three-way catalysis application17 Oct 2023US 11,786,885 B2Johnson Matthey Public Limited Company
- Exhuast Gas Purification Catalyst16 Jul 2026US 2026/0199887 A1Cataler Corporation
- Catalyst comprising a sulfur-trap material for the treatment of an exhaust gas stream containing one or more of formaldehyde, nitrogen oxide (no), and hydrocarbons9 Jul 2026US 2026/0192253 A1
- Multi-layer twc formulations with optimalized pgm loadings17 Jul 2025US 2025/0229227 A1Johnson Matthey Public Limited Company
- Exhaust Gas Purification Catalyst19 Jun 2025US 2025/0196108 A1Cataler Corporation
- Sulfur-containing organic compound assisted metal nanoparticle synthesis for three-way catalysis application28 Dec 2023US 2023/0415129 A1Johnson Matthey Public Limited Company
Most cited
By later US patents
- Exhaust gas treatment catalyst54US 7,374,729 B2BASF Catalysts LLC · 2008
- Multilayered catalyst compositions30US 7,754,171 B2BASF SE · 2010
- Exhaust gas treatment catalyst22US 7,501,098 B2BASF Catalysts LLC · 2009
- High surface area ruthenium bonding supports on monolithic ceramics20US 3,990,998 AExxon Research & Engineering Co. · 1976
- Process for producing denitrating catalysts15US 4,040,981 AHitachi Shipbuilding & Engineering Co., Ltd. · 1977