F01N 2330/48
Characterised by the number of flow passages
Official title: characterised by the number of flow passages, e.g. cell density
F01N2330/48 (Characterised by the number of flow passages) appears on 205 US grants and 249 published applications in this corpus.
Search patents in F01N- Granted patents
- 205
- Published applications
- 249
- Assignees
- 69
- Inventors
- 428
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 0 |
| 2004 | 1 | 21 |
| 2005 | 1 | 23 |
| 2006 | 7 | 17 |
| 2007 | 9 | 21 |
| 2008 | 11 | 9 |
| 2009 | 21 | 17 |
| 2010 | 13 | 10 |
| 2011 | 11 | 9 |
| 2012 | 12 | 10 |
| 2013 | 10 | 5 |
| 2014 | 5 | 12 |
| 2015 | 8 | 17 |
| 2016 | 5 | 11 |
| 2017 | 16 | 12 |
| 2018 | 16 | 7 |
| 2019 | 5 | 10 |
| 2020 | 8 | 6 |
| 2021 | 8 | 9 |
| 2022 | 7 | 8 |
| 2023 | 8 | 7 |
| 2024 | 5 | 3 |
| 2025 | 4 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Honeycomb structure8 Sep 2026US 12,728,377 B2NGK Insulators, Ltd.
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine25 Aug 2026US 12,714,990 B2Johnson Matthey Public Limited Company
- Pillar-shaped honeycomb structure and method for manufacturing same10 Feb 2026US 12,544,702 B2NGK Insulators, Ltd.
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine1 Jul 2025US 12,343,714 B2Johnson Matthey Public Limited Company
- Exhaust treatment method and apparatus having particulate filters and SCR6 May 2025US 12,291,987 B2Corning Incorporated
- Porous complex and method of producing porous complex1 Jan 2026US 2026/0001018 A1NGK Insulators, Ltd.
- Catalyst-loaded honeycomb article having in-wall and on-wall catalyst deposition and method of manufacture27 Nov 2025US 2025/0360498 A1Corning Incorporated
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine18 Sep 2025US 2025/0288980 A1Johnson Matthey Public Limited Company
- Exhaust treatment method and apparatus having particulate filters and scr24 Jul 2025US 2025/0237161 A1Corning Incorporated
- Electrically heating catalytic converter23 May 2024US 2024/0167411 A1NGK Insulators, Ltd.
Most cited
By later US patents
- Ceramic filters for diesel exhaust particulates158US 4,276,071 AGeneral Motors Corporation · 1981
- Pre-form for exhaust aftertreatment control filter63US 6,582,490 B2Fleetguard, Inc. · 2003
- Ceramic honeycomb filter and its production method60US 7,578,864 B2Hitachi Metals, Ltd. · 2009
- Filtraion device with variable thickness walls52US 5,641,332 ACorning Incorporated · 1997
- Method and apparatus for forming an article with multi-cellular densities and/or geometries48US 5,108,685 ACorning Incorporated · 1992