- 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 11/20 - Chemically or biochemically modified fibres
Patent holdings for IPC class D21H 11/20
Total number of patents in this class: 530
10-year publication summary
|
45
|
37
|
30
|
48
|
55
|
72
|
55
|
38
|
27
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Oji Holdings Corporation | 660 |
49 |
| Nippon Paper Industries Co., Ltd. | 782 |
43 |
| Stora Enso Oyj | 1504 |
32 |
| GP Cellulose GmbH | 98 |
26 |
| Kimberly-clark Worldwide, Inc. | 5854 |
25 |
| GPCP IP Holdings LLC | 1733 |
23 |
| UPM-Kymmene Corporation | 868 |
22 |
| Eastman Chemical Company | 2239 |
15 |
| International Paper Company | 857 |
14 |
| Daio Paper Corporation | 1407 |
9 |
| Novozymes A/S | 3314 |
6 |
| Cellutech AB | 24 |
6 |
| Innventia AB | 36 |
6 |
| Tetra Laval Holdings & Finance S.A. | 2007 |
6 |
| Suzano S.A. | 181 |
6 |
| Marusumi Paper Co., Ltd. | 12 |
6 |
| The Procter & Gamble Company | 22178 |
5 |
| Fiberlean Technologies Limited | 116 |
5 |
| Rayonier Performance Fibers, LLC | 23 |
5 |
| Solenis Technologies, L.P. | 306 |
5 |
| Other owners | 216 |