B01D 2252/2041
Diamines
B01D2252/2041 (Diamines) appears on 116 US grants and 194 published applications in this corpus.
Search patents in B01D- Granted patents
- 116
- Published applications
- 194
- Assignees
- 111
- Inventors
- 467
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 2 | 0 |
| 2010 | 0 | 6 |
| 2011 | 1 | 11 |
| 2012 | 4 | 12 |
| 2013 | 10 | 14 |
| 2014 | 6 | 8 |
| 2015 | 4 | 12 |
| 2016 | 6 | 15 |
| 2017 | 8 | 16 |
| 2018 | 14 | 14 |
| 2019 | 14 | 16 |
| 2020 | 8 | 16 |
| 2021 | 6 | 4 |
| 2022 | 14 | 9 |
| 2023 | 7 | 8 |
| 2024 | 4 | 11 |
| 2025 | 7 | 11 |
| 2026 | 1 | 8 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Amine solvent-based carbon capture compositions10 Feb 2026US 12,544,708 B2International Business Machines Corporation
- Methods and compositions for carbon capture30 Dec 2025US 12,508,536 B2Entropy Inc.
- Removal of acid gases from gaseous mixtures containing them30 Dec 2025US 12,509,639 B2ENI S. p. A.
- Compositions and methods for carbon dioxide capture4 Nov 2025US 12,458,920 B2The Board of Trustees of the University of Illinois
- Process and system for capture of carbon dioxide1 Jul 2025US 12,343,676 B2Commonwealth Scientific and Industrial Research Organisation
- Absorption liquid for capturing carbon dioxide and use thereof, and method for capturing carbon dioxide1 Oct 2026US 2026/0295511 A1China Petroleum & Chemical Corporation
- Composite amine absorption liquid1 Oct 2026US 2026/0295512 A1Mitsubishi Heavy Industries, Ltd.
- Compositions, methods, and systems for carbon capture10 Sep 2026US 2026/0263992 A1Board of Regents, The University of Texas System
- Compositions and methods for carbon dioxide capture and fluid sweetening10 Sep 2026US 2026/0263993 A1Solugen, Inc.
- Methods And Compositions for Carbon Capture2 Apr 2026US 2026/0091345 A1Entropy Inc.
Most cited
By later US patents
- Application of amine-tethered solid sorbents to CO2 fixation from air34US 8,491,705 B22013
- Process for the recovery of carbon dioxide from a gas stream25US 7,601,315 B2Cansolv Technologies Inc. · 2009
- CO2 removal from gas using ionic liquid absorbents17US 7,527,775 B2Chevron U.S.A.Inc. · 2009
- CO2 absorption from gas mixtures using an aqueous solution of 4-amino-2,2,6,6-tetramethylpiperidine15US 8,500,892 B2Evonik Degussa GmbH · 2013
- CO2 absorption from gas mixtures using an aqueous solution of 4-amino-2,2,6,6-tetramethylpiperidine13US 8,500,867 B2Evonik Degussa GmbH · 2013