F01N 3/04
Using liquids
Official title: using liquids
F01N3/04 (Using liquids) appears on 789 US grants and 601 published applications in this corpus.
Search patents in F01N- Granted patents
- 789
- Published applications
- 601
- Assignees
- 351
- Inventors
- 1,524
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 12 | 0 |
| 1991 | 11 | 0 |
| 1992 | 15 | 0 |
| 1993 | 13 | 0 |
| 1994 | 15 | 0 |
| 1995 | 5 | 0 |
| 1996 | 12 | 0 |
| 1997 | 9 | 0 |
| 1998 | 22 | 0 |
| 1999 | 18 | 0 |
| 2000 | 15 | 0 |
| 2001 | 7 | 9 |
| 2002 | 19 | 19 |
| 2003 | 23 | 17 |
| 2004 | 13 | 20 |
| 2005 | 12 | 18 |
| 2006 | 15 | 21 |
| 2007 | 15 | 16 |
| 2008 | 10 | 21 |
| 2009 | 12 | 15 |
| 2010 | 13 | 19 |
| 2011 | 11 | 29 |
| 2012 | 12 | 28 |
| 2013 | 34 | 36 |
| 2014 | 24 | 33 |
| 2015 | 39 | 31 |
| 2016 | 34 | 45 |
| 2017 | 38 | 27 |
| 2018 | 23 | 33 |
| 2019 | 33 | 25 |
| 2020 | 42 | 41 |
| 2021 | 44 | 22 |
| 2022 | 29 | 31 |
| 2023 | 23 | 20 |
| 2024 | 20 | 12 |
| 2025 | 20 | 9 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pollutant capturer and mobilizer8 Sep 2026US 12,729,640 B2
- Post-combustion engine exhaust gases absorber18 Aug 2026US 12,710,005 B2
- Apparatus for reducing greenhouse gas emission in vessel and vessel including the same14 Jul 2026US 12,678,736 B2Daewoo Shipbuilding & Marine Engineering Co., Ltd.
- Device for capturing oily emissions2 Jun 2026US 12,644,600 B2
- Scrubber for washing exhaust fumes generated by internal combustion engines26 May 2026US 12,636,609 B2Ecospray Technologies S.r.l.
- Post-capture carbon dioxide processing and storage16 Jul 2026US 2026/0199830 A1Valero Services, Inc.
- Absorption chiller system with a transport membrane heat exchanger23 Apr 2026US 2026/0110462 A1Scuderi Group, LLC
- System and method for controlling coolant of vehicle12 Mar 2026US 2026/0071568 A1Hyundai Motor Company
- Ammonia vent gas treatment system and vent gas treatment method using same8 Jan 2026US 2026/0007999 A1Hd Hyundai Heavy Industries Co., Ltd.
- Exhaust gas treatment system, absorbing liquid management apparatus and treatment method of exhaust gas11 Dec 2025US 2025/0376935 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Exhaust gas recirculation in internal combustion engines90US 5,785,030 ADry Systems Technologies · 1998
- Multi-chambered air cleaner74US 4,578,091 A1986
- Exhaust gas scrubber for internal combustion engines68US 4,300,924 APACCAR Inc · 1981
- System for purifying exhaust gas65US 5,464,458 A1995
- Exhaust element with heat exchanger65US 6,141,961 AECIA-Equipments et Composants pour l'Industrie Automobile · 2000