F01N 1/12
Using spirally or helically shaped channels
Official title: using spirally or helically shaped channels (cyclones B04C)
F01N1/12 (Using spirally or helically shaped channels) appears on 111 US grants and 62 published applications in this corpus.
Search patents in F01N- Granted patents
- 111
- Published applications
- 62
- Assignees
- 60
- Inventors
- 176
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 2 |
| 2002 | 3 | 3 |
| 2003 | 4 | 1 |
| 2004 | 3 | 5 |
| 2005 | 2 | 5 |
| 2006 | 2 | 5 |
| 2007 | 2 | 1 |
| 2008 | 4 | 4 |
| 2009 | 1 | 2 |
| 2010 | 5 | 3 |
| 2011 | 5 | 1 |
| 2012 | 1 | 3 |
| 2013 | 3 | 3 |
| 2014 | 3 | 2 |
| 2015 | 1 | 2 |
| 2016 | 2 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 2 | 3 |
| 2022 | 1 | 4 |
| 2023 | 6 | 1 |
| 2024 | 3 | 2 |
| 2025 | 2 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air-transparent selective sound silencer using ultra-open metamaterial8 Jul 2025US 12,352,190 B2Trustees of Boston University
- Sound attenuator as well as elements and a method of production thereof20 May 2025US 12,305,547 B2Teknologian tutkimuskeskus VTT Oy
- Compact exhaust gas treatment system with serviceable filter1 Oct 2024US 12,104,513 B2Dinex A/S
- Sound attenuator apparatus and method21 May 2024US 11,988,123 B1
- Constant velocity muffler assembly13 Feb 2024US 11,898,474 B2
- Decomposition chamber for aftertreatment system1 Oct 2026US 2026/0298121 A1Cummins Emission Solutions Inc.
- Mixing device for mixing a reaction medium into a gas stream, exhaust gas path with such a mixing device and internal combustion engine30 Apr 2026US 2026/0117690 A1Rolls-Royce Solutions GmbH
- Ventilation type silencer3 Jul 2025US 2025/0216119 A1FUJIFILM Corporation
- Air-transparent selective sound silencer using ultra-open metamaterial7 Mar 2024US 2024/0077008 A1Trustees of Boston University
- Compact exhaust gas treatment system with serviceable filter7 Mar 2024US 2024/0077012 A1Dinex A/S
Most cited
By later US patents
- Muffler62US 6,415,888 B2LG Electronics Inc. · 2002
- Exhaust muffler for internal combustion engines59US 5,198,625 A1993
- Method and apparatus for control of fluids53US 4,685,534 A1987
- Exhaust apparatus for internal combustion engine51US 4,050,539 A1977
- Exhaust system for internal combustion engines51US 5,388,408 ALawrence-Keech Inc. · 1995