- All sections
- C - Chemistrymetallurgy
- 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: 2511
10-year publication summary
|
168
|
172
|
225
|
211
|
164
|
123
|
98
|
120
|
92
|
87
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bridgestone Corporation | 7225 |
313 |
| Sumitomo Rubber Industries, Ltd. | 4674 |
138 |
| The Yokohama Rubber Co., Ltd. | 4078 |
86 |
| Compagnie Generale des Etablissements Michelin | 4766 |
84 |
| Michelin Recherche et Technique S.A. | 2160 |
77 |
| Kuraray Co., Ltd. | 3518 |
57 |
| Sumitomo Chemical Company, Limited | 9079 |
43 |
| Zeon Corporation | 4113 |
37 |
| Bridgestone Americas Tire Operations, LLC | 1075 |
36 |
| Pirelli Tyre S.p.A. | 1922 |
33 |
| Continental Reifen Deutschland GmbH | 2459 |
30 |
| Lanxess Deutschland GmbH | 1110 |
30 |
| ExxonMobil Chemical Patents Inc. | 3974 |
28 |
| Societe de Technologie Michelin | 566 |
28 |
| Bando Chemical Industries, Ltd. | 590 |
27 |
| Nippon Paper Industries Co., Ltd. | 834 |
25 |
| LG Chem, Ltd. | 17676 |
22 |
| Acushnet Company | 2530 |
22 |
| Compagnie générale des établissements Michelin SCA | 2583 |
22 |
| Kao Corporation | 4984 |
20 |
| Other owners | 1353 |