B01D 2252/204
Amines
B01D2252/204 (Amines) appears on 1,201 US grants and 1,819 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,201
- Published applications
- 1,819
- Assignees
- 553
- Inventors
- 3,016
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 1 | 6 |
| 2009 | 4 | 3 |
| 2010 | 5 | 22 |
| 2011 | 5 | 60 |
| 2012 | 18 | 104 |
| 2013 | 56 | 110 |
| 2014 | 68 | 122 |
| 2015 | 67 | 138 |
| 2016 | 98 | 123 |
| 2017 | 98 | 130 |
| 2018 | 122 | 125 |
| 2019 | 118 | 117 |
| 2020 | 96 | 110 |
| 2021 | 81 | 96 |
| 2022 | 94 | 78 |
| 2023 | 72 | 118 |
| 2024 | 72 | 125 |
| 2025 | 75 | 135 |
| 2026 | 48 | 93 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2252/20478AlkanolaminesIndexing code488
- B01D 2252/20436Cyclic aminesIndexing code299
- B01D 2252/20431Tertiary aminesIndexing code253
- B01D 2252/20405MonoaminesIndexing code186
- B01D 2252/20421Primary aminesIndexing code174
- B01D 2252/20426Secondary aminesIndexing code173
- B01D 2252/2041DiaminesIndexing code116
- B01D 2252/20415Tri- or polyaminesIndexing code79
All 9 subgroupsShow fewer
Recent patents
- CO2 recovery system and CO2 recovery method6 Oct 2026US 12,752,235 B2Mitsubishi Heavy Industries, Ltd.
- Use of silica nanoparticles with triazine for H2S scavenging6 Oct 2026US 12,752,236 B2Nissan Chemical America Corporation
- Drain discharge structure in compressed pneumatic circuit8 Sep 2026US 12,728,385 B2Fukuhara Co., Ltd.
- Once through CO2 absorber with integrated ammonia slip mitigation and intercooling1 Sep 2026US 12,722,115 B2Nuovo Pignone Tecnologie Srl
- Chemical additives for direct air carbon capture25 Aug 2026US 12,714,966 B2Halliburton Energy Services.Inc.
- Absorbent for Capturing Carbon Dioxide8 Oct 2026US 2026/0307000 A1Panasia Co., Ltd.
- Catalytic reactor and system for purification of carbon dioxide streams and methods of using the same8 Oct 2026US 2026/0307007 A1Oxy Low Carbon Ventures, LLC
- Amino acid based carbon dioxide capture catalyzed with three-dimensional graphene8 Oct 2026US 2026/0307044 A1University of Wyoming
- Carbon dioxide absorbent, method for recovering carbon dioxide, and apparatus for separating and recovering carbon dioxide8 Oct 2026US 2026/0307045 A1Mitsubishi Gas Chemical Company, Inc.
- Carbon dioxide absorbent, method for recovering carbon dioxide, and apparatus for separating and recovering carbon dioxide8 Oct 2026US 2026/0307046 A1Mitsubishi Gas Chemical Company, Inc.
Most cited
By later US patents
- Methods and configurations for acid gas enrichment156US 7,635,408 B2Fluor Technologies Corporation · 2009
- Method and apparatus for extracting carbon dioxide from air125US 7,708,806 B2Global Research Technologies, LLC · 2010
- Slagging coal combustor for cementitious slag production, metal oxide reduction, shale gas and oil recovery, enviromental remediation, emission control and CO2 sequestration77US 8,337,613 B22012
- Selective-permeation gas-separation process and apparatus62US 4,750,918 AThe Trustees of the Stevens Institute of Technology · 1988
- Rapid temperature swing adsorption contactors for gas separation56US 8,673,059 B2ExxonMobil Research and Engineering Company · 2014