System and method for substance removal
US-2024261718-A1 · Aug 8, 2024 · US
by diffusion
by diffusion · 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 | B01D53/268 |
| Official title | {by diffusion} |
| Display label | by diffusion |
| Total patents | 356 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 19 |
| 2017 | 37 |
| 2018 | 32 |
| 2019 | 37 |
| 2020 | 52 |
| 2021 | 30 |
| 2022 | 35 |
| 2023 | 29 |
| 2024 | 31 |
| 2025 | 33 |
| 2026 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing a humidifier block for a humidifier
US-9847539-B2 · Dec 19, 2017 · US
Membrane humidifier for fuel cell
US-9837673-B2 · Dec 5, 2017 · US
Device for withdrawing and for transporting a breathing gas stream
US-2017326326-A1 · Nov 16, 2017 · US
Internal combustion engine
US-2017306894-A1 · Oct 26, 2017 · US
Waterproof ventilator and electronic device apparatus
US-2017303409-A1 · Oct 19, 2017 · US
Method for producing a humidifier block for a humidifier
US-2017301932-A1 · Oct 19, 2017 · US
Humidifier, for Example for a Fuel Cell
US-2017279138-A1 · Sep 28, 2017 · US
Vapor separator and dehumidifier using the same
US-2017259205-A1 · Sep 14, 2017 · US
Dehumidifying device and dehumidifying module
US-9751048-B2 · Sep 5, 2017 · US
Method of separating a gas using at least one membrane in contact with an organosilicon fluid
US-9731245-B2 · Aug 15, 2017 · US
Dehumidifying apparatus for a housing
US-2017225866-A1 · Aug 10, 2017 · US
Humidifier, plate, device, and motor vehicle
US-2017222235-A1 · Aug 3, 2017 · US
Refrigerator Appliances with Passive Storage Compartments
US-2017205137-A1 · Jul 20, 2017 · US
Flow management and co2-recovery apparatus and method of use
US-2017173520-A1 · Jun 22, 2017 · US
Flow management and co2-recovery apparatus and method of use
US-2017176100-A1 · Jun 22, 2017 · US
Thermal drying system for additive manufacturing device
US-2017157855-A1 · Jun 8, 2017 · US
Waterproof member and electronic device including the waterproof member
US-2017157573-A1 · Jun 8, 2017 · US
Method and system for purification of natural gas using membranes
US-2017157557-A1 · Jun 8, 2017 · US
Water separation composite membrane
US-2017113190-A1 · Apr 27, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D53/268?
- CPC B01D53/268 is the Cooperative Patent Classification code for “by diffusion.”
- How many patents are filed under CPC B01D53/268 (by diffusion)?
- Our database includes 356 publications tagged with this CPC code.
- Is patent activity under CPC B01D53/268 growing?
- Publication counts under this code: 31 in 2024 vs 33 in 2025 (latest complete years).