C01B 32/312
Preparation
C01B32/312 (Preparation) appears on 771 US grants and 935 published applications in this corpus.
Search patents in C01B- Granted patents
- 771
- Published applications
- 935
- Assignees
- 543
- Inventors
- 2,066
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 11 | 0 |
| 1979 | 11 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 9 | 0 |
| 1995 | 11 | 0 |
| 1996 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 2 | 0 |
| 1999 | 12 | 0 |
| 2000 | 8 | 0 |
| 2001 | 15 | 0 |
| 2002 | 4 | 10 |
| 2003 | 8 | 14 |
| 2004 | 5 | 11 |
| 2005 | 4 | 13 |
| 2006 | 8 | 15 |
| 2007 | 6 | 21 |
| 2008 | 2 | 19 |
| 2009 | 10 | 24 |
| 2010 | 20 | 30 |
| 2011 | 10 | 35 |
| 2012 | 26 | 27 |
| 2013 | 25 | 33 |
| 2014 | 23 | 37 |
| 2015 | 34 | 52 |
| 2016 | 25 | 43 |
| 2017 | 41 | 51 |
| 2018 | 38 | 34 |
| 2019 | 35 | 53 |
| 2020 | 32 | 54 |
| 2021 | 28 | 74 |
| 2022 | 35 | 48 |
| 2023 | 47 | 68 |
| 2024 | 46 | 63 |
| 2025 | 46 | 51 |
| 2026 | 42 | 55 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Activated carbon production and methods therefor22 Sep 2026US 12,741,875 B2Atlas Power Technologies Inc.
- High-carbon biogenic reagents and uses thereof1 Sep 2026US 12,723,211 B2Carbon Technology Holdings, LLC
- Method of preparing hard carbon anode material and use thereof28 Jul 2026US 12,692,164 B2Guangdong Brunp Recycling Technology Co., Ltd.
- Activated carbon and method for manufacturing the same28 Jul 2026US 12,692,165 B2LG Energy Solution, Ltd.
- Bio-oil light fraction-based bread-shaped porous activated carbon, method for preparing the same and use thereof14 Jul 2026US 12,679,735 B2Zhejiang University
- Sorbent materials for gas storage1 Oct 2026US 2026/0295557 A1Entegris, Inc.
- Method and system for producing activated carbon24 Sep 2026US 2026/0285688 A1Valmet Corporation
- Device and method for integrated production of aviation fuel and porous carbon by biomass pyrolysis with graded catalytic activation24 Sep 2026US 2026/0286229 A1Southeast University
- Porous carbon material and preparation method thereof, and silicon-carbon material and application thereof24 Sep 2026US 2026/0290824 A1Ningde Amperex Technology Limited
- Graphene and methods of making graphene17 Sep 2026US 2026/0274675 A1
Most cited
By later US patents
- Active carbon process and composition212US 4,082,694 AStandard Oil Company (Indiana) · 1978
- Biochar157US 8,361,186 B1Full Circle Biochar, Inc. · 2013
- Production of highly microporous activated carbon products149US 5,416,056 AWestvaco Corporation · 1995
- Active carbon materials, process for the preparation thereof and the use thereof141US 5,242,879 AMitsubishi Gas Chemical Company, Inc. · 1993
- Process for removing mercury from a gas136US 4,196,173 AAkzo NVV. · 1980