C01B 32/196
Purification
C01B32/196 (Purification) appears on 65 US grants and 95 published applications in this corpus.
Search patents in C01B- Granted patents
- 65
- Published applications
- 95
- Assignees
- 72
- Inventors
- 207
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 2 |
| 2012 | 1 | 4 |
| 2013 | 1 | 0 |
| 2014 | 2 | 5 |
| 2015 | 2 | 4 |
| 2016 | 6 | 9 |
| 2017 | 6 | 8 |
| 2018 | 7 | 4 |
| 2019 | 4 | 10 |
| 2020 | 3 | 5 |
| 2021 | 6 | 8 |
| 2022 | 7 | 4 |
| 2023 | 5 | 12 |
| 2024 | 6 | 8 |
| 2025 | 3 | 6 |
| 2026 | 5 | 3 |
By publication year. 2026 runs to 8 Oct.
Recent patents
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- Highly dispersible graphene material15 Sep 2026US 12,735,321 B2Yazaki Corporation
- Ultrafast flash joule heating synthesis methods and systems for performing same11 Aug 2026US 12,703,891 B2William Marsh Rice University
- Method for preparing nano-graphene oxide by electrochemically exfoliating carbon fiber material21 Jul 2026US 12,686,618 B2Zhejiang University
- Layer-number-controllable graphene derived from natural biomass and preparation method thereof14 Apr 2026US 12,600,632 B2Hangzhou Atomic Carbon Materials Co,. Ltd.
- Method for recycling graphite and recycled graphite20 Aug 2026US 2026/0246000 A1Vianode AS
- A method for the production of edge functionalised graphene2 Jul 2026US 2026/0184572 A1Sicona Battery Technologies Pty Ltd
- Method for preparing carbon microparticle composite material, flexible electrode material, and method for preparing flexible electrode23 Apr 2026US 2026/0110584 A1Chongqing University
- Graphene quantum dots from carbon materials25 Dec 2025US 2025/0388473 A1Lyten, Inc.
- Water surface tension enabled high quality graphene transfer11 Dec 2025US 2025/0376757 A1Georgia State University Research Foundation, Inc.
Most cited
By later US patents
- Nano-scaled graphene plate films and articles21US 9,233,850 B2Nanotek Instruments, Inc. · 2016
- Methods, devices and systems for processing of carbonaceous compositions12US 9,782,739 B2Nanotech Energy, Inc. · 2017
- Method for removing a carbonization catalyst from a graphene sheet and method for transferring the graphene sheet10US 7,968,674 B2Samsung Electronics Co., Ltd. · 2011
- Method for purifying graphene powder10US 8,672,246 B2Korea Institute of Science and Technology · 2014
- Sorting two-dimensional nanomaterials by thickness7US 9,221,064 B2Northwestern University · 2015