F01N 3/02
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise
Official title: for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N3/01 {; mixing air with exhaust in tailpipes F01N13/082, F01N13/20})
F01N3/02 (Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise) appears on 7,905 US grants and 8,587 published applications in this corpus.
Search patents in F01N- Granted patents
- 7,905
- Published applications
- 8,587
- Assignees
- 1,487
- Inventors
- 12,265
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 10 | 0 |
| 1978 | 9 | 0 |
| 1979 | 7 | 0 |
| 1980 | 24 | 0 |
| 1981 | 26 | 0 |
| 1982 | 32 | 0 |
| 1983 | 35 | 0 |
| 1984 | 40 | 0 |
| 1985 | 44 | 0 |
| 1986 | 37 | 0 |
| 1987 | 53 | 0 |
| 1988 | 32 | 0 |
| 1989 | 65 | 0 |
| 1990 | 58 | 0 |
| 1991 | 72 | 0 |
| 1992 | 62 | 0 |
| 1993 | 69 | 0 |
| 1994 | 34 | 0 |
| 1995 | 59 | 0 |
| 1996 | 38 | 0 |
| 1997 | 42 | 0 |
| 1998 | 68 | 0 |
| 1999 | 65 | 0 |
| 2000 | 51 | 0 |
| 2001 | 48 | 32 |
| 2002 | 68 | 123 |
| 2003 | 87 | 184 |
| 2004 | 125 | 255 |
| 2005 | 135 | 284 |
| 2006 | 165 | 308 |
| 2007 | 177 | 388 |
| 2008 | 169 | 417 |
| 2009 | 212 | 447 |
| 2010 | 256 | 423 |
| 2011 | 275 | 473 |
| 2012 | 344 | 358 |
| 2013 | 391 | 382 |
| 2014 | 380 | 389 |
| 2015 | 418 | 472 |
| 2016 | 360 | 394 |
| 2017 | 414 | 478 |
| 2018 | 329 | 437 |
| 2019 | 456 | 432 |
| 2020 | 400 | 449 |
| 2021 | 421 | 374 |
| 2022 | 357 | 357 |
| 2023 | 319 | 258 |
| 2024 | 243 | 207 |
| 2025 | 220 | 146 |
| 2026 | 82 | 120 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for lambda control of spark-ignition engines, and motor vehicle29 Sep 2026US 12,747,711 B2Schaeffler Technologies AG & Co. KG
- Display driving device comprising an emission circuit and positive feedback circuit22 Sep 2026US 12,742,407 B2Purem GmbH
- System and method for controlling a cold light off catalyst8 Sep 2026US 12,729,639 B2Fca US LLC
- Pollutant capturer and mobilizer8 Sep 2026US 12,729,640 B2
- Exhaust gas rectifier and exhaust gas purification system1 Sep 2026US 12,723,530 B2Yanmar Holdings Co., Ltd.
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- Exhaust heat recovery device8 Oct 2026US 2026/0309067 A1
- 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
Most cited
By later US patents
- Diesel particulate trap330US 4,329,162 ACorning Glass Works · 1982
- Radio frequency process sensing, control, and diagnostics network and system267US 10,118,119 B2CTS Corporation · 2018
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- Treatment of diesel exhaust gases207US 4,902,487 AJohnson Matthey PLC · 1990
- Honeycomb filter and ceramic filter assembly201US 6,669,751 B1Ibiden Co., Ltd. · 2003