B01D 2251/30
Alkali metal compounds
B01D2251/30 (Alkali metal compounds) appears on 948 US grants and 1,415 published applications in this corpus.
Search patents in B01D- Granted patents
- 948
- Published applications
- 1,415
- Assignees
- 765
- Inventors
- 2,989
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 11 | 2 |
| 2002 | 7 | 9 |
| 2003 | 6 | 10 |
| 2004 | 5 | 8 |
| 2005 | 4 | 9 |
| 2006 | 9 | 15 |
| 2007 | 6 | 9 |
| 2008 | 7 | 19 |
| 2009 | 6 | 28 |
| 2010 | 18 | 50 |
| 2011 | 16 | 68 |
| 2012 | 32 | 58 |
| 2013 | 37 | 80 |
| 2014 | 66 | 74 |
| 2015 | 53 | 75 |
| 2016 | 48 | 72 |
| 2017 | 63 | 83 |
| 2018 | 56 | 62 |
| 2019 | 69 | 60 |
| 2020 | 64 | 78 |
| 2021 | 53 | 69 |
| 2022 | 59 | 79 |
| 2023 | 66 | 101 |
| 2024 | 55 | 102 |
| 2025 | 56 | 131 |
| 2026 | 34 | 64 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Chemical additives for direct air carbon capture25 Aug 2026US 12,714,966 B2Halliburton Energy Services.Inc.
- Flue gas purification system for hazardous waste incineration and purification method25 Aug 2026US 12,714,969 B2Chongqing Greening Environmental Protection Co. Ltd
- Using carbon dioxide from a direct air capture system as a low global warming car and industrial refrigerant25 Aug 2026US 12,716,620 B2AirMyne, Inc.
- Alkali enrichment mediated CO2 sequestration methods, and systems for practicing the same28 Jul 2026US 12,691,410 B1Blue Planet Systems Corporation
- System and method for dual-pathway system for carbon dioxide capture from ocean water30 Jun 2026US 12,668,518 B2California Institute of Technology
- 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
- Process for stripping co2 from solutions of alkali metal carbonates10 Sep 2026US 2026/0263989 A1Giammarco Technologies S.R.L.
Most cited
By later US patents
- Flue gas mercury control214US 8,080,088 B12011
- Self-adhesive vent filter and adsorbent assembly with a diffusion tube156US 5,417,743 AW. L. Gore & Associates, Inc. · 1995
- Air cleaning adsorption process105US 4,012,206 AGas Developments Corporation · 1977
- Exhaust purification device of an internal combustion engine88US 5,412,945 AKabushiki Kaisha Toyota Cho Kenkusho · 1995
- Bulk gas sorption and apparatus, gas containment/treatment system comprising same, and sorbent composition therefor81US 5,151,395 ANovapure Corporation · 1992