- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 5/02 - Working-up waste paper
Patent holdings for IPC class D21C 5/02
Total number of patents in this class: 442
10-year publication summary
|
32
|
27
|
39
|
39
|
30
|
29
|
32
|
34
|
28
|
10
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Unicharm Corporation | 2968 |
34 |
| Seiko Epson Corporation | 20256 |
28 |
| Kemira Oyj | 1258 |
24 |
| Uni-Charm Corporation | 599 |
23 |
| UPM-Kymmene Corporation | 994 |
13 |
| Duplo Seiko Corporation | 88 |
11 |
| GPCP IP Holdings LLC | 1529 |
10 |
| Ecolab USA Inc. | 5796 |
8 |
| Enzymatic Deinking Technologies, LLC | 42 |
8 |
| Stora Enso Oyj | 1653 |
8 |
| Nalco Company | 536 |
7 |
| Andritz Inc. | 322 |
6 |
| Honext Material S.L. | 14 |
6 |
| Kemira Water Solutions, Inc. | 38 |
5 |
| Nippon Paper Industries Co., Ltd. | 849 |
5 |
| Juno Recycle, Inc. | 5 |
5 |
| First Quality Tissue, LLC | 164 |
4 |
| King Abdulaziz University | 521 |
4 |
| Mayr-Melnhof Karton Aktiengesellschaft | 222 |
4 |
| Juno LLC | 12 |
4 |
| Other owners | 225 |