B01D 2256/22
Carbon dioxide
B01D2256/22 (Carbon dioxide) appears on 515 US grants and 759 published applications in this corpus.
Search patents in B01D- Granted patents
- 515
- Published applications
- 759
- Assignees
- 365
- Inventors
- 1,723
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 7 | 2 |
| 2002 | 3 | 4 |
| 2003 | 5 | 4 |
| 2004 | 3 | 5 |
| 2005 | 1 | 2 |
| 2006 | 2 | 1 |
| 2007 | 2 | 11 |
| 2008 | 3 | 10 |
| 2009 | 7 | 13 |
| 2010 | 3 | 27 |
| 2011 | 11 | 42 |
| 2012 | 25 | 38 |
| 2013 | 29 | 44 |
| 2014 | 26 | 37 |
| 2015 | 23 | 34 |
| 2016 | 27 | 34 |
| 2017 | 29 | 33 |
| 2018 | 28 | 37 |
| 2019 | 29 | 38 |
| 2020 | 30 | 34 |
| 2021 | 30 | 33 |
| 2022 | 35 | 42 |
| 2023 | 34 | 48 |
| 2024 | 26 | 60 |
| 2025 | 34 | 61 |
| 2026 | 18 | 65 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Use of silica nanoparticles with triazine for H2S scavenging6 Oct 2026US 12,752,236 B2Nissan Chemical America Corporation
- Gas separation system and gas separation method15 Sep 2026US 12,734,476 B2NGK Insulators, Ltd.
- Atmospheric steam desorption for direct air capture18 Aug 2026US 12,708,870 B2Climeworks AG
- Comprehensive energy utilization system for coupling carbon capture, energy storage, and thermal power generation18 Aug 2026US 12,710,000 B2Exax Energy Technology (Shenzhen) Co., Ltd
- Systems of separating carbon dioxide from flue gas and sequestering liquid carbon dioxide18 Aug 2026US 12,710,226 B2Carbon Vault Technologies LLC
- 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
- Co2 and h2o co-electrolyser system8 Oct 2026US 2026/0308775 A1Ecole Polytechnique Federale De Lausanne (Epfl)
- Co2 capture and hydrogen recovery from fuel cell anode off gas8 Oct 2026US 2026/0312104 A1Uop LLC
- Dac apparatus1 Oct 2026US 2026/0295504 A1Honda Motor Co., Ltd.
- Atmospheric steam desorption for direct air capture1 Oct 2026US 2026/0295505 A1Climeworks AG
Most cited
By later US patents
- Methods and configurations for acid gas enrichment156US 7,635,408 B2Fluor Technologies Corporation · 2009
- Carbon dioxide pressure swing adsorption process using modified alumina adsorbents155US 5,917,136 AAir Products and Chemicals, Inc. · 1999
- Regeneration of adsorbents138US 4,784,672 AAir Products and Chemicals, Inc. · 1988
- Process for separating components of a gas stream137US 4,701,187 AAir Products and Chemicals, Inc. · 1987
- Recovery of methane from land fill gas136US 4,770,676 AAir Products and Chemicals, Inc. · 1988