B01D 2251/21
Organic compounds not provided for in groups b01d2251/206 or b01d2251/208
Official title: Organic compounds not provided for in groups B01D2251/206 or B01D2251/208
B01D2251/21 (Organic compounds not provided for in groups b01d2251/206 or b01d2251/208) appears on 120 US grants and 112 published applications in this corpus.
Search patents in B01D- Granted patents
- 120
- Published applications
- 112
- Assignees
- 100
- Inventors
- 374
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 11 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 3 |
| 2006 | 0 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 4 |
| 2009 | 0 | 3 |
| 2010 | 7 | 13 |
| 2011 | 1 | 7 |
| 2012 | 7 | 8 |
| 2013 | 6 | 3 |
| 2014 | 1 | 10 |
| 2015 | 8 | 3 |
| 2016 | 6 | 6 |
| 2017 | 4 | 10 |
| 2018 | 6 | 7 |
| 2019 | 6 | 4 |
| 2020 | 9 | 6 |
| 2021 | 5 | 2 |
| 2022 | 5 | 1 |
| 2023 | 2 | 4 |
| 2024 | 1 | 5 |
| 2025 | 2 | 1 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Use of silica nanoparticles with glyoxal for H2S scavenging16 Jun 2026US 12,654,130 B2Nissan Chemical America Corporation
- Diesel exhaust fluid with additive10 Mar 2026US 12,571,335 B2Jsip, LLC
- Stabilized concentrated formaldehyde solutions and methods of use thereof20 May 2025US 12,305,125 B2Bl Technologies, Inc.
- Methods and systems for automatically generating a remedial action in an industrial facility7 Jan 2025US 12,190,701 B2Suncoke Technology and Development LLC
- Wellsite greenhouse gas reduction and hydrogen production system and method6 Aug 2024US 12,055,018 B1
- Carbon dioxide extraction using diffusion17 Sep 2026US 2026/0273457 A1International Business Machines Corporation
- Combination carbon monoxide and nitrogen dioxide scrubber treatment and process17 Sep 2026US 2026/0273461 A1
- Catalyst composition, exhaust gas treatment method using the same, and exhaust gas treatment system including the same13 Aug 2026US 2026/0233206 A1Gwangju Institute of Science and Technology
- Non-Triazine Based Scavengers30 Apr 2026US 2026/0115648 A1ChampionX LLC
- Gas abatement apparatus and gas treatment method9 Apr 2026US 2026/0097361 A1Kanken Techno Co., Ltd.
Most cited
By later US patents
- NOx decreasing apparatus for an internal combustion engine153US 5,412,946 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1995
- Catalyst for catalytic reduction of nitrogen oxide94US 5,380,692 AAgency of Industrial Science and Technology · 1995
- Catalyst and method for catalytic reduction of nitrogen oxides67US 6,045,765 APetroleum Energy Center · 2000
- Method for removing nitrogen oxides from exhaust gases53US 5,041,272 AInstitute of Research and Innovation · 1991
- Aldehyde gas absorbent and process for absorbing aldehyde gas39US 6,540,936 B1Toagosei Co., Ltd. · 2003