B01D 2251/604
Hydroxides
B01D2251/604 (Hydroxides) appears on 558 US grants and 878 published applications in this corpus.
Search patents in B01D- Granted patents
- 558
- Published applications
- 878
- Assignees
- 504
- Inventors
- 1,838
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 5 | 1 |
| 2002 | 1 | 3 |
| 2003 | 3 | 6 |
| 2004 | 1 | 4 |
| 2005 | 3 | 6 |
| 2006 | 4 | 5 |
| 2007 | 1 | 2 |
| 2008 | 5 | 12 |
| 2009 | 5 | 18 |
| 2010 | 8 | 33 |
| 2011 | 9 | 23 |
| 2012 | 12 | 25 |
| 2013 | 16 | 26 |
| 2014 | 31 | 38 |
| 2015 | 25 | 33 |
| 2016 | 20 | 43 |
| 2017 | 27 | 40 |
| 2018 | 36 | 45 |
| 2019 | 33 | 41 |
| 2020 | 51 | 60 |
| 2021 | 38 | 40 |
| 2022 | 40 | 57 |
| 2023 | 34 | 59 |
| 2024 | 44 | 76 |
| 2025 | 53 | 114 |
| 2026 | 32 | 68 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydrated lime for carbon capture1 Sep 2026US 12,722,136 B1Lhoist North America, Inc.
- Chemical additives for direct air carbon capture25 Aug 2026US 12,714,966 B2Halliburton Energy Services.Inc.
- Alkali enrichment mediated CO2 sequestration methods, and systems for practicing the same28 Jul 2026US 12,691,410 B1Blue Planet Systems Corporation
- Atmospheric carbon dioxide removal process21 Jul 2026US 12,685,964 B1
- Systems and methods of sequestering carbon dioxide in concrete14 Jul 2026US 12,679,779 B2Innovative Carbon Technologies Inc.
- Filter system for the removal of volatile organosulfur compounds (voscs) from indoor air8 Oct 2026US 2026/0306980 A1Air Tech Group, SLU
- High-efficiency carbonation reaction system and method for capturing carbon dioxide from flue gas continuously1 Oct 2026US 2026/0295508 A1National Atomic Research Institute
- Air contactor24 Sep 2026US 2026/0284592 A1
- An integrated resource recovery and co-treatment system of desalination brine and flue gas via waste brine electrolysis and sustainable co2 mineralisation (from brine to newseawater)17 Sep 2026US 2026/0273466 A1Nanyang Technological University
- Direct air capture of carbon dioxide17 Sep 2026US 2026/0273467 A1Carbon Utility LLC
Most cited
By later US patents
- Process for purifying exhaust gas using modified calcium hydroxide80US 5,618,508 AFTU GmbH Technische Entwicklung und Forschung Im Umweltschutz · 1997
- Apparatus and methods for reducing carbon dioxide content of an air stream79US 6,200,543 B1Mississippi Lime Company · 2001
- Carbon dioxide capture process with regenerable sorbents77US 6,387,337 B1The United States of America as represented by the United States Department of Energy · 2002
- Process for separating synthesis gas into fuel cell quality hydrogen and sequestration ready carbon dioxide74US 6,667,022 B2General Electric Company · 2003
- Systems and methods for extraction of carbon dioxide from air71US 7,699,909 B2The Trustees of Columbia University in the City of New York · 2010