- All sections
- C - Chemistry; metallurgy
- C08L - Compositions of macromolecular compounds
- C08L 21/00 - Compositions of unspecified rubbers
Patent holdings for IPC class C08L 21/00
Total number of patents in this class: 2440
10-year publication summary
|
178
|
177
|
185
|
235
|
221
|
170
|
126
|
104
|
121
|
28
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bridgestone Corporation | 7067 |
298 |
| Sumitomo Rubber Industries, Ltd. | 4421 |
134 |
| The Yokohama Rubber Co., Ltd. | 3929 |
88 |
| Michelin Recherche et Technique S.A. | 2328 |
83 |
| Compagnie Generale des Etablissements Michelin | 4450 |
82 |
| Kuraray Co., Ltd. | 3392 |
55 |
| Sumitomo Chemical Company, Limited | 8808 |
42 |
| Bridgestone Americas Tire Operations, LLC | 990 |
34 |
| Pirelli Tyre S.p.A. | 1832 |
34 |
| Societe de Technologie Michelin | 692 |
34 |
| Zeon Corporation | 3854 |
34 |
| ExxonMobil Chemical Patents Inc. | 4286 |
30 |
| Lanxess Deutschland GmbH | 1104 |
30 |
| Continental Reifen Deutschland GmbH | 2324 |
26 |
| Bando Chemical Industries, Ltd. | 570 |
23 |
| LG Chem, Ltd. | 17205 |
22 |
| Nippon Paper Industries Co., Ltd. | 782 |
22 |
| Compagnie générale des établissements Michelin SCA | 2477 |
21 |
| Acushnet Company | 2337 |
20 |
| Kao Corporation | 4843 |
19 |
| Other owners | 1309 |