C01B 3/0021
Elemental carbon
Official title: Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes
C01B3/0021 (Elemental carbon) appears on 144 US grants and 203 published applications in this corpus.
Search patents in C01B- Granted patents
- 144
- Published applications
- 203
- Assignees
- 126
- Inventors
- 510
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 6 |
| 2003 | 7 | 11 |
| 2004 | 2 | 15 |
| 2005 | 3 | 11 |
| 2006 | 6 | 10 |
| 2007 | 4 | 11 |
| 2008 | 6 | 10 |
| 2009 | 2 | 13 |
| 2010 | 11 | 16 |
| 2011 | 12 | 22 |
| 2012 | 9 | 15 |
| 2013 | 11 | 11 |
| 2014 | 13 | 4 |
| 2015 | 8 | 6 |
| 2016 | 4 | 5 |
| 2017 | 7 | 3 |
| 2018 | 3 | 8 |
| 2019 | 4 | 4 |
| 2020 | 3 | 1 |
| 2021 | 2 | 4 |
| 2022 | 3 | 2 |
| 2023 | 4 | 4 |
| 2024 | 2 | 3 |
| 2025 | 4 | 3 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lithiation induced porous Pd nanoparticle/3D Graphene aerogel composite for highly reversible hydrogen storage based on spillover process11 Aug 2026US 12,703,626 B2Korea Advanced Institute of Science and Technology
- Carbon-based compositions with highly efficient volumetric gas sorption27 Jan 2026US 12,533,654 B2Group14 Technologies, Inc.
- Hydrogen fuel storage device21 Oct 2025US 12,449,097 B1
- Method for producing hydrogen gas from sweet sorghum9 Sep 2025US 12,410,450 B1
- Hydrogen storage material5 Aug 2025US 12,378,112 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Hydrogen storage material and fuel cell containing the same17 Sep 2026US 2026/0279868 A1
- System and method for storing and recovering hydrogen23 Jul 2026US 2026/0209037 A1Ariel Scientific Innovations Ltd.
- Hydrogen storage material22 Jan 2026US 2026/0022011 A1The Government of the United States of America, as represented by the Secretary of the Navy
- Apparatus and method for producing graphene and hydrogen8 Jan 2026US 2026/0008673 A1Levidian Nanosystems Limited
- Apparatus and Processes of Instantiating the Same31 Jul 2025US 2025/0242323 A1Alpha Portfolio LLC
Most cited
By later US patents
- Process for the preparation of nanostructured materials191US 7,056,455 B2Carnegie Mellon University · 2006
- Hydrogen storage, distribution, and recovery system107US 7,169,489 B2FuelSell Technologies, Inc. · 2007
- Storage of hydrogen in layered nanostructures94US 5,653,951 ACatalytic Materials, LLC · 1997
- Production of single-walled carbon nanotubes by a hydrogen arc discharge method92US 6,517,800 B1Institute of Metal Research Chinese Academy of Sciences · 2003
- Activated carbon cryogels and related methods75US 8,158,556 B2EnerG2, Inc. · 2012