B01D 2251/502
Hydrochloric acid
B01D2251/502 (Hydrochloric acid) appears on 62 US grants and 81 published applications in this corpus.
Search patents in B01D- Granted patents
- 62
- Published applications
- 81
- Assignees
- 41
- Inventors
- 181
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 4 |
| 2008 | 1 | 3 |
| 2009 | 3 | 6 |
| 2010 | 6 | 7 |
| 2011 | 9 | 8 |
| 2012 | 3 | 3 |
| 2013 | 1 | 0 |
| 2014 | 2 | 3 |
| 2015 | 4 | 2 |
| 2016 | 1 | 2 |
| 2017 | 3 | 5 |
| 2018 | 1 | 4 |
| 2019 | 6 | 6 |
| 2020 | 2 | 1 |
| 2021 | 3 | 6 |
| 2022 | 7 | 8 |
| 2023 | 5 | 5 |
| 2024 | 2 | 1 |
| 2025 | 3 | 5 |
By publication year.
Recent patents
- Metal sulfides on alkali earth particle substrates25 Nov 2025US 12,478,944 B2Atlas Carbon, LLC
- Liquid sorbent-enhanced ammonia production11 Nov 2025US 12,465,888 B1Alliance for Sustainable Energy, LLC
- Methods and systems for automatically generating a remedial action in an industrial facility7 Jan 2025US 12,190,701 B2Suncoke Technology and Development LLC
- System for removing ammonia, dust and pathogens from air within an animal rearing/sheltering facility21 May 2024US 11,986,768 B2The United States of America as represented by the Secretary of Agriculture
- Methods of treating metal carbonate salts5 Mar 2024US 11,918,970 B2Energy & Environmental Research Center Foundation
- Carbon dioxide-separating apparatus and carbon dioxide capture and storage system16 Oct 2025US 2025/0319434 A1Korea University Research and Business Foundation
- Electrochemical capture of carbon dioxide from air with electricity storage17 Apr 2025US 2025/0121325 A1The Johns Hopkins University
- Method of hydrolyzing calcium chloride brine27 Feb 2025US 2025/0066205 A1Energy & Environmental Research Center Foundation
- Versatile scrubbing liquid for removal of contaminants from a gaseous stream6 Feb 2025US 2025/0041798 A1
- Photocatalytic aerosol6 Feb 2025US 2025/0041840 A1
Most cited
By later US patents
- Method and apparatus for mitigating mercury emissions in exhaust gases41US 7,517,511 B2The Regents of the University of California · 2009
- Method and device for removing mercury38US 7,622,092 B2Mitsubishi Heavy Industries, Ltd. · 2009
- Air pollution control apparatus and air pollution control method31US 7,887,768 B2Mitsubishi Heavy Industries, Ltd. · 2011
- Gas liquid contactor and effluent cleaning system and method27US 7,866,638 B2Neumann Systems Group, Inc. · 2011
- Mercury reduction system and mercury reduction method of flue gas containing mercury25US 7,906,090 B2Mitsubishi Heavy Industries, Ltd. · 2011