B01D 2255/9025
Three layers
B01D2255/9025 (Three layers) appears on 143 US grants and 194 published applications in this corpus.
Search patents in B01D- Granted patents
- 143
- Published applications
- 194
- Assignees
- 67
- Inventors
- 450
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 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 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 3 |
| 2004 | 3 | 3 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 7 |
| 2009 | 5 | 7 |
| 2010 | 7 | 14 |
| 2011 | 5 | 4 |
| 2012 | 6 | 9 |
| 2013 | 6 | 4 |
| 2014 | 7 | 10 |
| 2015 | 8 | 15 |
| 2016 | 5 | 10 |
| 2017 | 11 | 13 |
| 2018 | 10 | 23 |
| 2019 | 15 | 13 |
| 2020 | 12 | 5 |
| 2021 | 8 | 13 |
| 2022 | 9 | 9 |
| 2023 | 12 | 8 |
| 2024 | 3 | 8 |
| 2025 | 5 | 3 |
| 2026 | 2 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Phosphor-transition metal-photocatalyst hybrid composite material, method for preparing the same, and filter using the same12 May 2026US 12,623,209 B2Hyundai Motor Company
- Selective catalytic reduction catalyst and a process for preparing a selective catalytic reduction catalyst10 Mar 2026US 12,569,810 B2BASF Mobile Emissions Catalysts LLC
- Diesel oxidation catalyst19 Aug 2025US 12,390,796 B2BASF Mobile Emissions Catalysts LLC
- Exhaust gas purification system20 May 2025US 12,303,831 B2Mitsui Mining & Smelting Co., Ltd.
- Rhodium-containing layered catalyst structures and methods of making the same8 Apr 2025US 12,269,016 B2GM Global Technology Operations LLC
- Exhaust gas purification catalyst device3 Sep 2026US 2026/0257210 A1Cataler Corporation
- Exhuast Gas Purification Catalyst16 Jul 2026US 2026/0199887 A1Cataler Corporation
- A copper- and and manganese-containing catalyst for the treatment of an exhaust gas stream containing one or more of formaldehyde, nitrogen oxide (no), and hydrocarbons9 Jul 2026US 2026/0192251 A1
- 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-phase catalyst system for sustainable reduction of nitrous oxide emissions25 Jun 2026US 2026/0175207 A1
Most cited
By later US patents
- Diesel oxidation catalyst composite with layer structure for carbon monoxide and hydrocarbon conversion79US 8,211,392 B2BASF SE · 2012
- Layered catalyst composite76US 6,764,665 B2Engelhard Corporation · 2004
- Layered catalyst composite71US 7,550,124 B2BASF Catalysts LLC · 2009
- Engine exhaust catalysts containing palladium-gold70US 7,534,738 B2Nanostellar, Inc. · 2009
- Engine exhaust catalysts containing palladium-gold67US 7,745,367 B2Nanostellar, Inc. · 2010