- All sections
- B - Performing operations; transporting
- 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: 7217
10-year publication summary
|
555
|
534
|
602
|
640
|
575
|
545
|
390
|
383
|
367
|
105
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Johnson Matthey Public Limited Company | 1852 |
567 |
| BASF Corporation | 2039 |
463 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
364 |
| Umicore AG & Co. KG | 867 |
353 |
| Cataler Corporation | 533 |
343 |
| Toyota Motor Corporation | 28582 |
237 |
| NGK Insulators, Ltd. | 4589 |
210 |
| Isuzu Motors Limited | 2158 |
206 |
| Mitsui Mining & Smelting Co., Ltd. | 1373 |
154 |
| Ibiden Co., Ltd. | 1724 |
116 |
| Cummins Emission Solutions, Inc. | 480 |
114 |
| BASF SE | 19740 |
113 |
| N.E. Chemcat Corporation | 193 |
80 |
| Honda Motor Co., Ltd. | 24537 |
78 |
| Denso Corporation | 23338 |
72 |
| Hino Motors, Ltd. | 370 |
71 |
| Caterpillar Inc. | 8877 |
70 |
| Rhodia Operations | 1645 |
69 |
| Umicore Shokubai Japan Co., Ltd. | 78 |
68 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
67 |
| Other owners | 3402 |