- 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 21/18 - Reinforcing agents
Patent holdings for IPC class D21H 21/18
Total number of patents in this class: 740
10-year publication summary
|
71
|
62
|
70
|
56
|
61
|
61
|
55
|
47
|
40
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1167 |
132 |
| Ecolab USA Inc. | 5190 |
49 |
| Stora Enso Oyj | 1504 |
34 |
| GPCP IP Holdings LLC | 1733 |
33 |
| Solenis Technologies, L.P. | 306 |
32 |
| Kimberly-clark Worldwide, Inc. | 5854 |
29 |
| BASF SE | 19740 |
21 |
| First Quality Tissue, LLC | 143 |
19 |
| S.p.c.m. SA | 308 |
16 |
| Fiberlean Technologies Limited | 116 |
14 |
| UPM-Kymmene Corporation | 868 |
13 |
| ARAKAWA Chemical Industries, Ltd. | 145 |
10 |
| Structured I, LLC | 54 |
9 |
| International Paper Company | 857 |
8 |
| Kemira Chemicals, Inc. | 78 |
8 |
| Nalco Company | 620 |
7 |
| Oberthur Fiduciaire SAS | 159 |
7 |
| Solenis Technologies Cayman, L.P. | 303 |
7 |
| Solenis Technologies Cayman, L.P. | 81 |
7 |
| Corn Products Development, Inc. | 609 |
6 |
| Other owners | 279 |