C01B 32/324
From waste materials
Official title: from waste materials, e.g. tyres or spent sulfite pulp liquor
C01B32/324 (From waste materials) appears on 137 US grants and 171 published applications in this corpus.
Search patents in C01B- Granted patents
- 137
- Published applications
- 171
- Assignees
- 145
- Inventors
- 475
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 5 |
| 2011 | 0 | 10 |
| 2012 | 6 | 10 |
| 2013 | 5 | 6 |
| 2014 | 4 | 9 |
| 2015 | 8 | 8 |
| 2016 | 6 | 7 |
| 2017 | 9 | 9 |
| 2018 | 8 | 4 |
| 2019 | 5 | 9 |
| 2020 | 7 | 7 |
| 2021 | 3 | 11 |
| 2022 | 8 | 16 |
| 2023 | 5 | 10 |
| 2024 | 7 | 16 |
| 2025 | 10 | 14 |
| 2026 | 7 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production9 Jun 2026US 12,649,959 B2Carbon Technology Holdings, LLC
- Carbon micro-plant21 Apr 2026US 12,605,691 B2Carbon Technology Holdings, LLC
- Method for producing a solid object from a biomaterial-based starting material14 Apr 2026US 12,600,637 B2Fifth Innovation Oy
- Carbon fiber materials from waste polyethylene and polyethylene oil17 Mar 2026US 12,577,112 B2Arizona Board of Regents on behalf of Arizona State University
- Processes and systems for recapturing carbon from biomass pyrolysis liquids10 Mar 2026US 12,570,904 B2Carbon Technology Holdings, LLC
- Method and system for producing activated carbon24 Sep 2026US 2026/0285688 A1Valmet Corporation
- Dispersion, adsorbent material for pfas, environmental improvement method, powder for environmental improvement liquid, method for dispersing porous carbon material, porous carbon material, and filter10 Sep 2026US 2026/0264044 A1Sony Group Corporation
- Porous material for hydrogen purification and method for producing same, and hydrogen purification apparatus20 Aug 2026US 2026/0241366 A1Osaka Gas Chemicals Co., Ltd.
- Carbon micro-plant20 Aug 2026US 2026/0241367 A1Carbon Technology Holdings, LLC
- Staged pyrolysis-catalytic gasification process systems for hydrogen production from biomass waste20 Aug 2026US 2026/0242679 A1Changzhou University
Most cited
By later US patents
- Active carbon materials, process for the preparation thereof and the use thereof141US 5,242,879 AMitsubishi Gas Chemical Company, Inc. · 1993
- Highly activated carbon from caustic digestion of rice hull ash and method83US 6,114,280 AAgritec, Inc. · 2000
- Porous carbon for electrochemical double layer capacitors61US 8,482,900 B2Corning Incorporated · 2013
- Carbon micro-plant58US 9,724,667 B2Carbon Technology Holdings, LLC · 2017
- Process for biomass conversion to synthesis gas55US 8,173,044 B1Cool Planet Biofuels, Inc. · 2012