- 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: 7230
10-year publication summary
|
502
|
584
|
627
|
563
|
536
|
382
|
382
|
367
|
317
|
170
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Johnson Matthey Public Limited Company | 1777 |
620 |
| Cataler Corporation | 577 |
373 |
| Umicore AG & Co. KG | 860 |
359 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12686 |
314 |
| BASF Corporation | 1713 |
270 |
| BASF Mobile Emissions Catalysts LLC | 414 |
260 |
| Toyota Motor Corporation | 33341 |
232 |
| NGK Insulators, Ltd. | 5134 |
213 |
| Isuzu Motors Limited | 2274 |
185 |
| Mitsui Mining & Smelting Co., Ltd. | 1508 |
173 |
| Cummins Emission Solutions, Inc. | 553 |
130 |
| Ibiden Co., Ltd. | 1714 |
107 |
| BASF SE | 21083 |
99 |
| Honda Motor Co., Ltd. | 25773 |
80 |
| Mitsubishi Heavy Industries, Ltd. | 8861 |
74 |
| Denso Corporation | 24729 |
72 |
| Caterpillar Inc. | 9709 |
72 |
| N.E. Chemcat Corporation | 189 |
72 |
| Corning Incorporated | 10382 |
69 |
| Umicore Shokubai Japan Co., Ltd. | 79 |
68 |
| Other owners | 3388 |