- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 31/02 - Preparation of carbon; Purification
Patent holdings for IPC class C01B 31/02
Total number of patents in this class: 3327
10-year publication summary
|
399
|
114
|
25
|
7
|
11
|
2
|
3
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| National Institute of Advanced Industrial Science and Technology | 3802 |
82 |
| Hon Hai Precision Industry Co., Ltd. | 4034 |
58 |
| Tsinghua University | 5931 |
58 |
| Zeon Corporation | 4079 |
49 |
| NEC Corporation | 35687 |
45 |
| LG Chem, Ltd. | 17638 |
39 |
| Toray Industries, Inc. | 6945 |
39 |
| William Marsh Rice University | 1009 |
33 |
| Massachusetts Institute of Technology | 10055 |
30 |
| The Regents of the University of California | 19929 |
24 |
| Fujitsu Limited | 18366 |
24 |
| Showa Denko K.K. | 2226 |
23 |
| Honda Motor Co., Ltd. | 25274 |
21 |
| Nitto Denko Corporation | 8241 |
21 |
| The University of Tokyo | 4179 |
21 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12797 |
21 |
| Centre National de La Recherche Scientifique | 10432 |
19 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10912 |
19 |
| Korea Advanced Institute of Science and Technology | 4382 |
19 |
| Arkema France | 4154 |
19 |
| Other owners | 2663 |