- All sections
- D - Textiles; paper
- D21H - Pulp compositions; preparation thereof not covered by subclasses , ; impregnating or coating of paper; treatment 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: 126
10-year publication summary
11
|
10
|
8
|
10
|
13
|
12
|
10
|
10
|
4
|
2
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Mitsubishi Chemical Corporation | 4313 |
9 |
E. I. du Pont de Nemours and Company | 4345 |
8 |
Toray Industries, Inc. | 6652 |
6 |
Mitsubishi Rayon Co., Ltd. | 1003 |
5 |
DuPont Teijin Advanced Papers (Japan), Ltd. | 37 |
5 |
Kuraray Co., Ltd. | 3392 |
3 |
SABIC Global Technologies B.V. | 4044 |
3 |
SGL Carbon SE | 388 |
3 |
Teijin Aramid GmbH | 49 |
3 |
United States Gypsum Company | 1019 |
3 |
AWA PAPER & TECHNOLOGICAL COMPANY, Inc. | 31 |
3 |
DuPont Safety & Construction, Inc. | 676 |
3 |
Shanghai Jazz New Material Technology Co., Ltd | 5 |
3 |
Dow Global Technologies LLC | 10147 |
2 |
Kolon Industries, Inc. | 1506 |
2 |
Sumitomo Bakelite Co., Ltd. | 1416 |
2 |
Teijin Limited | 1216 |
2 |
UT-Battelle, LLC | 1333 |
2 |
Zeon Corporation | 3854 |
2 |
Zhejiang University of Science and Technology | 31 |
2 |
Other owners | 55 |