C01B 32/17
Purification
C01B32/17 (Purification) appears on 190 US grants and 240 published applications in this corpus.
Search patents in C01B- Granted patents
- 190
- Published applications
- 240
- Assignees
- 167
- Inventors
- 530
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 15 |
| 2003 | 1 | 6 |
| 2004 | 3 | 3 |
| 2005 | 7 | 7 |
| 2006 | 13 | 4 |
| 2007 | 3 | 8 |
| 2008 | 6 | 21 |
| 2009 | 11 | 13 |
| 2010 | 8 | 17 |
| 2011 | 10 | 17 |
| 2012 | 16 | 10 |
| 2013 | 9 | 15 |
| 2014 | 6 | 7 |
| 2015 | 12 | 8 |
| 2016 | 6 | 13 |
| 2017 | 15 | 16 |
| 2018 | 9 | 10 |
| 2019 | 10 | 5 |
| 2020 | 9 | 8 |
| 2021 | 5 | 5 |
| 2022 | 6 | 8 |
| 2023 | 6 | 9 |
| 2024 | 5 | 1 |
| 2025 | 7 | 6 |
| 2026 | 1 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Carbon nanotube hybrid materials and methods of producing the hybrid materials25 Aug 2026US 12,715,773 B2Chasm Advanced Materials, Inc.
- Iron removal from carbon nanotubes and metal catalyst recycle25 Nov 2025US 12,479,729 B2Nanocomp Technologies, Inc.
- Apparatus and method for manufacturing high-density in-line carbon nanotube thin film2 Sep 2025US 12,403,497 B2Beijing Hua Tan Yuan Xin Electronics Technology Co., Ltd
- Method for preparing nitrogen/sulfur-doped activated carbon8 Jul 2025US 12,351,465 B1Kuwait University
- System and method for separation of salts and carbon allotropes1 Jul 2025US 12,344,526 B2SkyNano LLC
- Carbon nanotubes and method for purifying same, carbon nanotube dispersion, binder composition, electrode composition, and secondary cell16 Jul 2026US 2026/0200739 A1artience Co., Ltd.
- Carbon nanotube dispersed liquid, electrode mixture slurry, electrode film, and secondary battery4 Jun 2026US 2026/0155383 A1artience Co., Ltd.
- Method for preparing carbon microparticle composite material, flexible electrode material, and method for preparing flexible electrode23 Apr 2026US 2026/0110584 A1Chongqing University
- Carbon Nanotube Hybrid Materials and Methods of Producing the Hybrid Materials5 Mar 2026US 2026/0062300 A1Chasm Advanced Materials, Inc.
- Catalyst, Catalyst Precursor, Production Process, and Resulting High Purity and Controlled Morphology Carbon Nanotubes26 Feb 2026US 2026/0054256 A1Chasm Advanced Materials, Inc.
Most cited
By later US patents
- Carbon fibers formed from single-wall carbon nanotubes204US 6,683,783 B1William Marsh Rice University · 2004
- Method and apparatus for producing carbon nanotubes180US 6,413,487 B1The Board of Regents of the University of Oklahoma · 2002
- Process for purifying, uncapping and chemically modifying carbon nanotubes163US 5,698,175 ANEC Corporation · 1997
- Methods for producing composites of single-wall carbon nanotubes and compositions thereof161US 7,105,596 B2William Marsh Rice University · 2006
- Continuous fiber of single-wall carbon nanotubes154US 6,979,709 B2William Marsh Rice University · 2005