- 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 21/04 - Slime-control agents
Patent holdings for IPC class D21H 21/04
Total number of patents in this class: 59
10-year publication summary
|
3
|
5
|
4
|
2
|
2
|
5
|
3
|
4
|
3
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1244 |
16 |
| Kurita Water Industries Ltd. | 1269 |
7 |
| Novozymes A/S | 3361 |
4 |
| Buckman Laboratories International, Inc. | 240 |
4 |
| Ecolab USA Inc. | 5753 |
3 |
| Solenis Technologies Cayman, L.P. | 317 |
3 |
| Solenis Technologies, L.P. | 305 |
3 |
| BASF SE | 21165 |
2 |
| Katayama Chemical, Inc. | 35 |
2 |
| MainTech Co., Ltd. | 66 |
2 |
| Nalco Japan G.K. | 16 |
2 |
| SOLENIS TECHNOLOGIES, L.P., Solenis International, L.P., a Delaware limited partnership, DBA Solenis Technologies, L.P. | 222 |
2 |
| Ashland Licensing and Intellectual Property LLC | 86 |
1 |
| Nalco Company | 542 |
1 |
| Specialty Minerals (Michigan) Inc. | 232 |
1 |
| ACQUAFLEX s.r.l. | 3 |
1 |
| Abo Akademi | 27 |
1 |
| SCG Packaging Public Company Limited | 30 |
1 |
| Nesocell S.r.l. | 1 |
1 |
| Thai Paper Company Limited | 3 |
1 |
| Other owners | 1 |