B01J 20/20
Comprising free carbon
Official title: comprising free carbon; comprising carbon obtained by carbonising processes
B01J20/20 (Comprising free carbon) appears on 2,568 US grants and 3,327 published applications in this corpus.
Search patents in B01J- Granted patents
- 2,568
- Published applications
- 3,327
- Assignees
- 1,622
- Inventors
- 7,066
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 13 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 6 | 0 |
| 1981 | 13 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 11 | 0 |
| 1985 | 22 | 0 |
| 1986 | 8 | 0 |
| 1987 | 12 | 0 |
| 1988 | 7 | 0 |
| 1989 | 17 | 0 |
| 1990 | 13 | 0 |
| 1991 | 18 | 0 |
| 1992 | 23 | 0 |
| 1993 | 27 | 0 |
| 1994 | 31 | 0 |
| 1995 | 23 | 0 |
| 1996 | 24 | 0 |
| 1997 | 17 | 0 |
| 1998 | 38 | 0 |
| 1999 | 31 | 0 |
| 2000 | 29 | 0 |
| 2001 | 32 | 9 |
| 2002 | 35 | 61 |
| 2003 | 48 | 90 |
| 2004 | 59 | 76 |
| 2005 | 31 | 81 |
| 2006 | 37 | 97 |
| 2007 | 41 | 70 |
| 2008 | 33 | 87 |
| 2009 | 33 | 110 |
| 2010 | 61 | 129 |
| 2011 | 65 | 118 |
| 2012 | 76 | 122 |
| 2013 | 82 | 120 |
| 2014 | 99 | 139 |
| 2015 | 91 | 155 |
| 2016 | 94 | 149 |
| 2017 | 115 | 167 |
| 2018 | 121 | 182 |
| 2019 | 137 | 175 |
| 2020 | 129 | 169 |
| 2021 | 125 | 191 |
| 2022 | 98 | 178 |
| 2023 | 148 | 179 |
| 2024 | 133 | 184 |
| 2025 | 160 | 164 |
| 2026 | 72 | 125 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for preparing porous carbon structure having increased surface area and total pore volume, and porous carbon structure prepared using same6 Oct 2026US 12,753,079 B2Kolon Industries, Inc.
- Isolation and analysis of terpenes6 Oct 2026US 12,754,110 B2Orange Photonics, Inc.
- Adsorptive deodorizing materials, preparation methods, and air purification devices29 Sep 2026US 12,746,303 B2Guangdong Eraclean Technology Co., Ltd.
- Method of characterizing a sorbent29 Sep 2026US 12,746,531 B2Calgon Carbon Corporation
- Manufacturing method of chemical adsorbent for removing harmful gases, and apparatus thereof15 Sep 2026US 12,734,501 B2GTScien Co., Ltd.
- Amino acid based carbon dioxide capture catalyzed with three-dimensional graphene8 Oct 2026US 2026/0307044 A1University of Wyoming
- Photothermal polymeric aerogels for wastewater detoxification and water recycling8 Oct 2026US 2026/0308020 A1University of Kentucky Research Foundation
- Sorbent materials for gas storage1 Oct 2026US 2026/0295557 A1Entegris, Inc.
- Antibiological sorbent and method of manufacture thereof1 Oct 2026US 2026/0295561 A1Molekule Group, Inc.
- Perfluoroalkyl and polyfluoroalkyl sorbent materials and methods of use24 Sep 2026US 2026/0284633 A1Calgon Carbon Corporation
Most cited
By later US patents
- Process for removal of mercury vapor and adsorbent therefor229US 4,500,327 ATakeda Chemical Industries, Ltd. · 1985
- Low density, resorcinol-formaldehyde aerogels201US 4,873,218 AUnited States Department of Energy · 1989
- Low density, resorcinol-formaldehyde aerogels200US 4,997,804 AThe United States of America as represented by the United States Department of Energy · 1991
- Sodium zirconium carbonate and zirconium basic carbonate and methods of making the same194US 6,627,164 B1Renal Solutions, Inc. · 2003
- High performance liquid chromatography method and apparatus193US 5,919,368 ACohesive Technologies, Inc. · 1999