B01D 2251/90
Chelants
B01D2251/90 (Chelants) appears on 78 US grants and 84 published applications in this corpus.
Search patents in B01D- Granted patents
- 78
- Published applications
- 84
- Assignees
- 70
- Inventors
- 202
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 4 |
| 2007 | 1 | 2 |
| 2008 | 3 | 3 |
| 2009 | 0 | 1 |
| 2010 | 3 | 5 |
| 2011 | 1 | 4 |
| 2012 | 4 | 2 |
| 2013 | 2 | 3 |
| 2014 | 1 | 1 |
| 2015 | 2 | 3 |
| 2016 | 1 | 5 |
| 2017 | 3 | 3 |
| 2018 | 5 | 6 |
| 2019 | 5 | 6 |
| 2020 | 5 | 2 |
| 2021 | 5 | 3 |
| 2022 | 1 | 5 |
| 2023 | 7 | 9 |
| 2024 | 5 | 8 |
| 2025 | 2 | 4 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for exhaust gas pollution reduction12 May 2026US 12,623,185 B2Mercury Capture Intellectual Property, LLC
- Brewery and steam vent odor control system3 Mar 2026US 12,565,631 B2Simple Solutions Distributing, LLC
- Chemical compositions and methods of using same for remediating sulfur-containing compositions and other contaminants in fluids10 Feb 2026US 12,545,842 B2Gaps Technology, LLC.
- Recombinant microorganism including genetic modification that increases activity of nitric oxide reductase and method of reducing concentration of nitric oxide in sample by using the same10 Feb 2026US 12,545,932 B2Samsung Electronics Co., Ltd.
- CO2 capture and utilization system and method6 Jan 2026US 12,515,170 B2University of Kentucky Research Foundation
- Conditioning wet sour gas via integrated desulfurization and dehydration24 Sep 2026US 2026/0284582 A1Merichem Technologies, LLC
- Apparatus and method for exhaust gas pollution reduction17 Sep 2026US 2026/0273462 A1Mercury Capture Intellectual Property, LLC
- Hydrogen sulfide removal process4 Jun 2026US 2026/0151734 A1Merichem Technologies, LLC
- Geocatalysts and their application to control co2 capture processes, economically and with environmental benefits28 Aug 2025US 2025/0269324 A1Danmarks Tekniske Universitet
- Surface carbon mineralization process using petroleum refinery solid waste material21 Aug 2025US 2025/0262595 A1
Most cited
By later US patents
- Method of removing hydrogen sulfide from gases utilizing a polyvalent metal chelate solution and electrolytically regenerating the solution46US 4,443,423 AShell Oil Company · 1984
- Method for effecting gas-liquid contact41US 5,585,005 AApollo Environmental Systems Corp. · 1996
- Process for the removal of hydrogen sulfide from a gas stream25US 5,730,784 AApollo Environmental Systems Corp. · 1998
- Process for the removal of H.sub.2 S from fluid streams using a water soluble polymeric chelate of an oxidizing polyvalent metal21US 4,808,385 AThe Dow Chemical Company · 1989
- Solution of metal-polymer chelate(s) and applications thereof20US 8,193,291 B22012