- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 13/50 - Carbon fibres
Patent holdings for IPC class D21H 13/50
Total number of patents in this class: 128
10-year publication summary
|
10
|
8
|
10
|
13
|
12
|
10
|
10
|
4
|
8
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| E. I. du Pont de Nemours and Company | 4146 |
8 |
| Mitsubishi Chemical Corporation | 4474 |
8 |
| Toray Industries, Inc. | 6859 |
7 |
| Mitsubishi Rayon Co., Ltd. | 926 |
5 |
| DuPont Teijin Advanced Papers (Japan), Ltd. | 34 |
4 |
| Kuraray Co., Ltd. | 3482 |
3 |
| SABIC Global Technologies B.V. | 4263 |
3 |
| SGL Carbon SE | 387 |
3 |
| Teijin Aramid GmbH | 48 |
3 |
| United States Gypsum Company | 916 |
3 |
| AWA PAPER & TECHNOLOGICAL COMPANY, Inc. | 34 |
3 |
| Shanghai Jazz New Material Technology Co., Ltd | 5 |
3 |
| Dow Global Technologies LLC | 10306 |
2 |
| Kolon Industries, Inc. | 1625 |
2 |
| Sumitomo Bakelite Co., Ltd. | 1485 |
2 |
| University of Rochester | 1301 |
2 |
| UT-Battelle, LLC | 1440 |
2 |
| Zeon Corporation | 4063 |
2 |
| Giesecke+Devrient Currency Technology GmbH | 881 |
2 |
| Zhejiang University of Science and Technology | 35 |
2 |
| Other owners | 59 |