F01N 3/022
Characterised by specially adapted filtering structure
Official title: characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
F01N3/022 (Characterised by specially adapted filtering structure) appears on 1,604 US grants and 1,819 published applications in this corpus.
Search patents in F01N- Granted patents
- 1,604
- Published applications
- 1,819
- Assignees
- 407
- Inventors
- 2,848
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 11 | 0 |
| 1982 | 9 | 0 |
| 1983 | 14 | 0 |
| 1984 | 8 | 0 |
| 1985 | 12 | 0 |
| 1986 | 10 | 0 |
| 1987 | 10 | 0 |
| 1988 | 7 | 0 |
| 1989 | 18 | 0 |
| 1990 | 24 | 0 |
| 1991 | 14 | 0 |
| 1992 | 18 | 0 |
| 1993 | 23 | 0 |
| 1994 | 5 | 0 |
| 1995 | 18 | 0 |
| 1996 | 10 | 0 |
| 1997 | 13 | 0 |
| 1998 | 19 | 0 |
| 1999 | 10 | 0 |
| 2000 | 9 | 0 |
| 2001 | 10 | 6 |
| 2002 | 11 | 45 |
| 2003 | 23 | 52 |
| 2004 | 40 | 92 |
| 2005 | 31 | 98 |
| 2006 | 52 | 106 |
| 2007 | 56 | 123 |
| 2008 | 56 | 121 |
| 2009 | 76 | 116 |
| 2010 | 85 | 91 |
| 2011 | 91 | 75 |
| 2012 | 72 | 55 |
| 2013 | 70 | 40 |
| 2014 | 46 | 66 |
| 2015 | 48 | 74 |
| 2016 | 43 | 42 |
| 2017 | 51 | 88 |
| 2018 | 62 | 60 |
| 2019 | 61 | 75 |
| 2020 | 65 | 70 |
| 2021 | 63 | 82 |
| 2022 | 56 | 79 |
| 2023 | 67 | 52 |
| 2024 | 40 | 46 |
| 2025 | 40 | 27 |
| 2026 | 21 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Post-combustion engine exhaust gases absorber18 Aug 2026US 12,710,005 B2
- Honeycomb filter26 May 2026US 12,636,603 B2NGK Insulators, Ltd.
- Coated filters26 May 2026US 12,637,966 B2Johnson Matthey Public Limited Company
- Exhaust system and features thereof21 Apr 2026US 12,607,140 B2ECC TEC MSJ Incorporated
- Honeycomb filter14 Apr 2026US 12,599,862 B2NGK Insulators, Ltd.
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- Gas filter element, filter device and method of use1 Oct 2026US 2026/0295490 A1Pall Corporation
- Segment joint body1 Oct 2026US 2026/0298119 A1NGK Insulators, Ltd.
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
- Exhaust aftertreatment system, an engine system, and methods for controlling operation thereof3 Sep 2026US 2026/0258743 A1Volvo Truck Corporation
Most cited
By later US patents
- Diesel particulate trap330US 4,329,162 ACorning Glass Works · 1982
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- Honeycomb filter and ceramic filter assembly201US 6,669,751 B1Ibiden Co., Ltd. · 2003
- Ceramic structural body188US 5,914,187 AIbiden Co., Ltd. · 1999
- Honeycomb filter and method of making it163US 4,417,908 ACorning Glass Works · 1983