- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 53/92 - Chemical or biological purification of waste gases of engine exhaust gases
Patent holdings for IPC class B01D 53/92
Total number of patents in this class: 545
10-year publication summary
|
64
|
33
|
35
|
53
|
35
|
40
|
28
|
32
|
35
|
29
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Fuji Electric Co., Ltd. | 5511 |
30 |
| Johnson Matthey Public Limited Company | 1763 |
21 |
| Saudi Arabian Oil Company | 14305 |
20 |
| Mitsubishi Heavy Industries, Ltd. | 9168 |
17 |
| Shanghai Bixiufu Enterprise Management Co., Ltd. | 190 |
17 |
| Umicore AG & Co. KG | 850 |
15 |
| Perkins Engines Company Limited | 304 |
7 |
| Cummins Emission Solutions, Inc. | 582 |
7 |
| N/C Quest, Inc. | 21 |
7 |
| Daphne Technology SA | 51 |
7 |
| Mitsubishi Shipbuilding Co., Ltd. | 188 |
7 |
| Denso Corporation | 25645 |
6 |
| Alfa Laval Corporate AB | 1344 |
6 |
| Cataler Corporation | 575 |
6 |
| Japan Engine Corporation | 74 |
6 |
| Toyota Motor Corporation | 35927 |
5 |
| BASF Corporation | 1681 |
5 |
| NGK Spark Plug Co., Ltd. | 872 |
5 |
| Kubota Corporation | 4409 |
5 |
| Mitsubishi Hitachi Power Systems, Ltd. | 991 |
5 |
| Other owners | 341 |