B01D 46/2418
Honeycomb filters
Official title: {Honeycomb filters (used for filtering exhaust gases of an internal combustion engine F01N3/022; ceramic honeycomb structures per se C04B38/0006)}
B01D46/2418 (Honeycomb filters) appears on 1,202 US grants and 1,494 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,202
- Published applications
- 1,494
- Assignees
- 226
- Inventors
- 1,810
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 10 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 7 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 4 |
| 2002 | 5 | 18 |
| 2003 | 6 | 22 |
| 2004 | 18 | 39 |
| 2005 | 11 | 59 |
| 2006 | 29 | 83 |
| 2007 | 20 | 87 |
| 2008 | 39 | 89 |
| 2009 | 61 | 104 |
| 2010 | 57 | 76 |
| 2011 | 79 | 63 |
| 2012 | 66 | 52 |
| 2013 | 53 | 51 |
| 2014 | 56 | 85 |
| 2015 | 59 | 91 |
| 2016 | 56 | 41 |
| 2017 | 54 | 82 |
| 2018 | 59 | 81 |
| 2019 | 55 | 59 |
| 2020 | 63 | 64 |
| 2021 | 58 | 70 |
| 2022 | 55 | 62 |
| 2023 | 53 | 36 |
| 2024 | 41 | 28 |
| 2025 | 27 | 25 |
| 2026 | 26 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 46/2451Characterized by the geometrical structure, shape, pattern or configuration or parameters related809
- B01D 46/2425Characterized by parameters related to the physical properties of the honeycomb structure586
- B01D 46/2498The honeycomb filter being defined by mathematical relationships356
- B01D 46/2422Mounting of the body within a housing79
Recent patents
- Honeycomb structure8 Sep 2026US 12,728,377 B2NGK Insulators, Ltd.
- Vehicle air conditioning system1 Sep 2026US 12,722,109 B2NGK Insulators, Ltd.
- High filtration efficiency particulate filters having bimodal pore size distribution made from beads with open porosity11 Aug 2026US 12,702,946 B2Corning Incorporated
- Mat material, exhaust gas purification device, and method for producing mat material28 Jul 2026US 12,691,659 B2Ibiden Co., Ltd.
- Porous structure such as for filters, and making the same21 Jul 2026US 12,685,951 B2Corning Incorporated
- Gas filter element, filter device and method of use1 Oct 2026US 2026/0295490 A1Pall Corporation
- High efficiency air filter body1 Oct 2026US 2026/0295491 A1Corning Incorporated
- Honeycomb structure and honeycomb filter1 Oct 2026US 2026/0295525 A1NGK Insulators, Ltd.
- Image forming apparatus including main body housing, process unit, fixing device, exhaust fan, first duct, filter and seal1 Oct 2026US 2026/0299513 A1Brother Kogyo Kabushiki Kaisha
- Filter and method for manufacturing same10 Sep 2026US 2026/0263982 A1NGK Insulators, Ltd.
Most cited
By later US patents
- Composite planar and triangularly pleated filter element307US 4,925,561 ATsuchiya Mfg. Co., Ltd. · 1990
- 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
- Method of sealing, housing and constructing honeycomb filters180US 6,743,317 B22004
- Mercury removal apparatus and method176US 5,409,522 AADA Technologies, Inc. · 1995