- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
Patent holdings for IPC class B01D 53/94
Total number of patents in this class: 7238
10-year publication summary
|
602
|
640
|
575
|
546
|
391
|
388
|
370
|
322
|
202
|
165
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Johnson Matthey Public Limited Company | 1763 |
654 |
| Cataler Corporation | 575 |
379 |
| Umicore AG & Co. KG | 850 |
358 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12353 |
276 |
| BASF Mobile Emissions Catalysts LLC | 426 |
272 |
| BASF Corporation | 1681 |
271 |
| Toyota Motor Corporation | 35927 |
236 |
| NGK Insulators, Ltd. | 5200 |
206 |
| Isuzu Motors Limited | 2327 |
175 |
| Cummins Emission Solutions, Inc. | 582 |
138 |
| Mitsui Mining & Smelting Co., Ltd. | 1070 |
121 |
| Ibiden Co., Ltd. | 1678 |
108 |
| BASF SE | 21306 |
101 |
| Honda Motor Co., Ltd. | 26105 |
79 |
| Mitsubishi Heavy Industries, Ltd. | 9168 |
74 |
| N.E. Chemcat Corporation | 188 |
72 |
| Corning Incorporated | 10504 |
71 |
| Caterpillar Inc. | 10280 |
70 |
| Denso Corporation | 25645 |
69 |
| Umicore Shokubai Japan Co., Ltd. | 78 |
68 |
| Other owners | 3440 |