- All sections
- D - Textiles; paper
- D01F - Chemical features in the manufacture of man-made filaments, threads, fibres, bristles or ribbons; apparatus specially adapted for the manufacture of carbon filaments
- D01F 2/28 - Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture 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: 177
10-year publication summary
|
18
|
22
|
10
|
19
|
12
|
20
|
20
|
12
|
10
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Eastman Chemical Company | 2239 |
31 |
| Daicel Corporation | 2128 |
13 |
| Acetate International LLC | 63 |
12 |
| Toyobo Co., Ltd. | 2286 |
11 |
| Nippon Paper Industries Co., Ltd. | 782 |
9 |
| FUJIFILM Corporation | 27102 |
6 |
| Celanese Acetate LLC | 81 |
6 |
| Toray Industries, Inc. | 6652 |
4 |
| National University Corporation Hokkaido University | 1323 |
4 |
| Stora Enso Oyj | 1504 |
4 |
| Innovia Films Limited | 148 |
3 |
| Knowlton Technologies, LLC | 7 |
3 |
| Rhodia Acetow GmbH | 32 |
3 |
| Cerdia International GmbH | 28 |
3 |
| The Procter & Gamble Company | 22178 |
2 |
| LG Chem, Ltd. | 17205 |
2 |
| Kao Corporation | 4843 |
2 |
| Dai-Ichi Kogyo Seiyaku Co., Ltd. | 235 |
2 |
| Oji Holdings Corporation | 660 |
2 |
| Solvay Acetow GmbH | 29 |
2 |
| Other owners | 53 |