- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 21/18 - Reinforcing agents
Patent holdings for IPC class D21H 21/18
Total number of patents in this class: 775
10-year publication summary
|
70
|
56
|
61
|
61
|
56
|
47
|
52
|
45
|
41
|
24
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1262 |
142 |
| Ecolab USA Inc. | 5826 |
58 |
| Stora Enso Oyj | 1660 |
41 |
| Solenis Technologies, L.P. | 304 |
35 |
| GPCP IP Holdings LLC | 1529 |
25 |
| BASF SE | 21328 |
23 |
| First Quality Tissue, LLC | 166 |
23 |
| Kimberly-clark Worldwide, Inc. | 5259 |
22 |
| UPM-Kymmene Corporation | 1004 |
13 |
| SNF Group | 421 |
12 |
| ARAKAWA Chemical Industries, Ltd. | 156 |
10 |
| Fiberlean Technologies Limited | 98 |
10 |
| Solenis Technologies Cayman, L.P. | 321 |
10 |
| S.p.c.m. SA | 236 |
10 |
| Structured I, LLC | 62 |
9 |
| Kemira Chemicals, Inc. | 76 |
8 |
| Nalco Company | 532 |
7 |
| Seiko PMC Corporation | 84 |
6 |
| Billerudkorsnas AB | 88 |
5 |
| Corn Products Development, Inc. | 687 |
5 |
| Other owners | 301 |