- All sections
- D - Textilespaper
- D01F - Chemical features in the manufacture of man-made filaments, threads, fibres, bristles or ribbonsapparatus specially adapted for the manufacture of carbon filaments
- D01F 2/28 - Monocomponent artificial filaments or the like of cellulose or cellulose derivativesManufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
Patent holdings for IPC class D01F 2/28
Total number of patents in this class: 188
10-year publication summary
|
22
|
10
|
19
|
12
|
20
|
20
|
13
|
10
|
10
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Eastman Chemical Company | 2215 |
35 |
| Daicel Corporation | 2335 |
14 |
| Acetate International LLC | 64 |
12 |
| Toyobo Co., Ltd. | 2481 |
11 |
| Nippon Paper Industries Co., Ltd. | 827 |
9 |
| FUJIFILM Corporation | 29273 |
6 |
| Toray Industries, Inc. | 6918 |
4 |
| National University Corporation Hokkaido University | 1340 |
4 |
| Rhodia Acetow GmbH | 32 |
4 |
| Stora Enso Oyj | 1632 |
4 |
| The Procter & Gamble Company | 22043 |
3 |
| Innovia Films Limited | 153 |
3 |
| Knowlton Technologies, LLC | 7 |
3 |
| Cerdia International GmbH | 40 |
3 |
| LG Chem, Ltd. | 17581 |
2 |
| Kao Corporation | 4952 |
2 |
| Asahi Kasei Kabushiki Kaisha | 2644 |
2 |
| Celanese Acetate LLC | 70 |
2 |
| Dai-Ichi Kogyo Seiyaku Co., Ltd. | 229 |
2 |
| Oji Holdings Corporation | 717 |
2 |
| Other owners | 61 |