Air purifier
US-11794143-B2 · Oct 24, 2023 · US
General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D53/92 takes precedence)
General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D53/92 takes precedence) · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D53/74 |
| Official title | General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D53/92 takes precedence) |
| Display label | General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D53/92 takes precedence) |
| Total patents | 81 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 9 |
| 2017 | 5 |
| 2018 | 11 |
| 2019 | 7 |
| 2020 | 10 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 10 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Low temperature plasma reaction device and hydrogen sulfide decomposition method
US-11691119-B2 · Jul 4, 2023 · US
Carbon dioxide capturing system and operation method thereof
US-2023166213-A1 · Jun 1, 2023 · US
Engine system
US-2023147721-A1 · May 11, 2023 · US
Method for manufacturing photocatalytic filter having porous nanofiber heterostructure
US-11446647-B2 · Sep 20, 2022 · US
Ventilation seat of vehicle
US-2022281284-A1 · Sep 8, 2022 · US
Plant for absorption of individual components in gases
US-11306643-B2 · Apr 19, 2022 · US
Flue gas purification tower
US-11097218-B2 · Aug 24, 2021 · US
Methods and apparatus for conserving electronic device manufacturing resources
US-11049735-B2 · Jun 29, 2021 · US
Production of reactive oxidative species by photocat alytic activation of chlorine (I) under ultraviolet/visible light/near infrared irradiation
US-11046592-B2 · Jun 29, 2021 · US
Carbon dioxide capturing system and operation method thereof
US-2021170331-A1 · Jun 10, 2021 · US
Cluster supported catalyst and method for producing same
US-11014073-B2 · May 25, 2021 · US
Air Purifier
US-2021129070-A1 · May 6, 2021 · US
Process and apparatus for the recovery of methanol
US-10874983-B2 · Dec 29, 2020 · US
Low temperature plasma reaction device and hydrogen sulfide decomposition method
US-2020398245-A1 · Dec 24, 2020 · US
Method for manufacturing photocatalytic filter having porous nanofiber heterostructure
US-2020391193-A1 · Dec 17, 2020 · US
Process and apparatus for the recovery of methanol
US-2020282358-A1 · Sep 10, 2020 · US
Waste gas emission control system
US-2020276537-A1 · Sep 3, 2020 · US
Carbon dioxide capturing system and exhaust gas processing method
US-10737213-B2 · Aug 11, 2020 · US
Air filter assembly
US-2020223292-A1 · Jul 16, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D53/74?
- CPC B01D53/74 is the Cooperative Patent Classification code for “General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D53/92 takes precedence).”
- How many patents are filed under CPC B01D53/74 (General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D53/92 takes precedence))?
- Our database includes 81 publications tagged with this CPC code.
- Is patent activity under CPC B01D53/74 growing?
- Publication counts under this code: 10 in 2024 vs 5 in 2025 (latest complete years).