- 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: 781
10-year publication summary
|
62
|
70
|
56
|
61
|
61
|
56
|
47
|
51
|
41
|
29
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1207 |
140 |
| Ecolab USA Inc. | 5499 |
54 |
| Stora Enso Oyj | 1645 |
39 |
| Solenis Technologies, L.P. | 335 |
35 |
| Kimberly-clark Worldwide, Inc. | 5495 |
28 |
| GPCP IP Holdings LLC | 1630 |
26 |
| BASF SE | 20915 |
23 |
| First Quality Tissue, LLC | 156 |
22 |
| UPM-Kymmene Corporation | 940 |
13 |
| Fiberlean Technologies Limited | 114 |
12 |
| S.p.c.m. SA | 240 |
11 |
| SNF Group | 366 |
11 |
| ARAKAWA Chemical Industries, Ltd. | 150 |
9 |
| Structured I, LLC | 58 |
9 |
| International Paper Company | 785 |
8 |
| Kemira Chemicals, Inc. | 79 |
8 |
| Nalco Company | 561 |
7 |
| Corn Products Development, Inc. | 671 |
6 |
| Oberthur Fiduciaire SAS | 134 |
6 |
| Seiko PMC Corporation | 92 |
6 |
| Other owners | 308 |