B01J 20/324
Containing free carbon
Official title: {containing free carbon, e.g. activated carbon}
B01J20/324 (Containing free carbon) appears on 193 US grants and 265 published applications in this corpus.
Search patents in B01J- Granted patents
- 193
- Published applications
- 265
- Assignees
- 176
- Inventors
- 618
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 11 | 0 |
| 1998 | 7 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 5 |
| 2003 | 1 | 4 |
| 2004 | 4 | 6 |
| 2005 | 1 | 7 |
| 2006 | 6 | 4 |
| 2007 | 3 | 2 |
| 2008 | 1 | 6 |
| 2009 | 3 | 6 |
| 2010 | 1 | 12 |
| 2011 | 2 | 6 |
| 2012 | 3 | 7 |
| 2013 | 4 | 13 |
| 2014 | 9 | 16 |
| 2015 | 11 | 7 |
| 2016 | 5 | 11 |
| 2017 | 10 | 19 |
| 2018 | 8 | 15 |
| 2019 | 8 | 14 |
| 2020 | 7 | 13 |
| 2021 | 14 | 29 |
| 2022 | 10 | 15 |
| 2023 | 16 | 15 |
| 2024 | 9 | 13 |
| 2025 | 14 | 11 |
| 2026 | 4 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Antibiological sorbent and method of manufacture thereof4 Aug 2026US 12,697,602 B2Molekule Group, Inc.
- Water purification method using biochar layered double hydroxide composite21 Jul 2026US 12,685,994 B2Imam Abdulrahman Bin Faisal University
- Carbon-carbon composite sorbent formulations for carbon dioxide adsorption, and related methods26 May 2026US 12,636,632 B2Schlumberger Technology Corporation
- Carbon-based porous material and preparation method and use thereof10 Feb 2026US 12,545,589 B2China Petroleum & Chemical Corporation
- Biochar-supported layered double hydroxide-cellulose nanocrystals composite for dye removal30 Dec 2025US 12,508,570 B2Imam Abdulrahman Bin Faisal University
- Antibiological sorbent and method of manufacture thereof1 Oct 2026US 2026/0295561 A1Molekule Group, Inc.
- Carbon-carbon composite sorbent formulations for carbon dioxide adsorption, and related methods24 Sep 2026US 2026/0284634 A1Schlumberger Technology Corporation
- Adsorptive fabric construction with embedded adsorbent10 Sep 2026US 2026/0264048 A1NuMat Technologies, Inc.
- Metal ion adsorption and immobilization by carbon-coated oil-treated plastic granules16 Jul 2026US 2026/0199869 A1
- System and method of the adsorption of volatile organic compounds18 Jun 2026US 2026/0166465 A1Calgon Carbon Corporation
Most cited
By later US patents
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- Temperature swing adsorption and selective catalytic reduction NOx removal system72US 7,117,669 B2Eaton Corporation · 2006
- Carbon-coated inorganic substrates69US 5,451,444 A1995
- Carbon nanotube-containing catalysts, methods of making, and reactions catalyzed over nanotube catalysts69US 6,713,519 B2Battelle Memorial Institute · 2004
- Polymer-coated carbon-clad inorganic oxide particles68US 5,271,833 ARegents of the University of Minnesota · 1993