C01B 32/05
Preparation or purification of carbon not covered by groups c01b32/15, c01b32/20, c01b32/25
Official title: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
C01B32/05 (Preparation or purification of carbon not covered by groups c01b32/15, c01b32/20, c01b32/25) appears on 1,350 US grants and 2,200 published applications in this corpus.
Search patents in C01B- Granted patents
- 1,350
- Published applications
- 2,200
- Assignees
- 1,074
- Inventors
- 4,725
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 2 |
| 2002 | 7 | 14 |
| 2003 | 14 | 25 |
| 2004 | 8 | 10 |
| 2005 | 5 | 17 |
| 2006 | 11 | 24 |
| 2007 | 10 | 27 |
| 2008 | 6 | 25 |
| 2009 | 12 | 49 |
| 2010 | 28 | 45 |
| 2011 | 27 | 64 |
| 2012 | 20 | 60 |
| 2013 | 33 | 58 |
| 2014 | 39 | 95 |
| 2015 | 49 | 119 |
| 2016 | 77 | 87 |
| 2017 | 79 | 167 |
| 2018 | 89 | 110 |
| 2019 | 108 | 88 |
| 2020 | 90 | 106 |
| 2021 | 69 | 122 |
| 2022 | 88 | 136 |
| 2023 | 95 | 176 |
| 2024 | 123 | 204 |
| 2025 | 103 | 237 |
| 2026 | 69 | 133 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermocatalytic decomposition of methane using catalyst system design and operational parameters to control product yield and properties6 Oct 2026US 12,753,072 B2Battelle Memorial Institute
- 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.
- Circular carbon process29 Sep 2026US 12,747,159 B2BASF SE
- Method for growing 2D/3D carbon-based nano- and submicron-sized structures8 Sep 2026US 12,729,121 B2Sabanci Universitesi
- Process for producing carbon from heat treated lignin1 Sep 2026US 12,722,975 B2Stora Enso OYJ
- Methods of preparing hard carbon material and energy storage device and method of enhancing plateau capacity8 Oct 2026US 2026/0307995 A1National Tsing Hua University
- Negative electrode active material, method of manufacturing the negative electrode active material, and negative electrode including the negative electrode active material8 Oct 2026US 2026/0307996 A1Samsung SDI.Co., Ltd.
- Treatment agent for acrylic fibers and use of the same8 Oct 2026US 2026/0308815 A1Matsumoto Yushi-Seiyaku Co., Ltd.
- Negative electrode material and preparation method thereof, battery, and electrical device8 Oct 2026US 2026/0312009 A1Contemporary Amperex Technology (Hong Kong) Limited
- Porous carbon material and preparation method thereof, and silicon-carbon material and application thereof1 Oct 2026US 2026/0296890 A1Ningde Amperex Technology Limited
Most cited
By later US patents
- Method for the production of hydrogen-containing gaseous mixtures233US 6,685,754 B2Alchemix Corporation · 2004
- Process for the preparation of nanostructured materials191US 7,056,455 B2Carnegie Mellon University · 2006
- Biochar157US 8,361,186 B1Full Circle Biochar, Inc. · 2013
- Rigid porous carbon structures, methods of making, methods of using and products containing same143US 6,099,965 AHyperion Catalysis International, Inc. · 2000
- Ultrapure synthetic carbon materials127US 8,404,384 B2EnerG2 Technologies, Inc. · 2013