Method to control the extraction rate in a membrane based biogas upgrading plant
US-11202985-B2 · Dec 21, 2021 · US
Multiple stage diffusion
Multiple stage 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 | B01D53/225 |
| Official title | {Multiple stage diffusion} |
| Display label | Multiple stage diffusion |
| Total patents | 104 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 5 |
| 2017 | 8 |
| 2018 | 10 |
| 2019 | 10 |
| 2020 | 13 |
| 2021 | 18 |
| 2022 | 17 |
| 2023 | 7 |
| 2024 | 6 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Membrane process and system for high recovery of a nonpermeating gas
US-2021299605-A1 · Sep 30, 2021 · US
Membrane permeation treatment with adjustment of the number of membranes used as a function of the pressure of the feed gas flow
US-2021283549-A1 · Sep 16, 2021 · US
Oxidative coupling of methane
US-11117848-B2 · Sep 14, 2021 · US
Installation and method for the treatment by membrane permeation of a gas stream with the aspiration pressure of the second permeate adjusted
US-11083991-B2 · Aug 10, 2021 · US
Membrane permeation treatment with adjustment of the number of membranes used as a function of the pressure of the feed gas flow
US-11052345-B2 · Jul 6, 2021 · US
Membrane permeation treatment with adjustment of the temperature of the first retentate as a function of the CH4 concentration in the third and/or fourth permeate
US-11045760-B2 · Jun 29, 2021 · US
Multi-stage membrane systems with polymeric and microporous zeolitic inorganic membranes for gas separations
US-11033856-B2 · Jun 15, 2021 · US
System for detecting an abnormality in a carbon dioxide separation membrane plant
US-11000801-B2 · May 11, 2021 · US
Polyimide, dianhydride monomers, and polymers, methods of making and uses thereof
US-11001672-B2 · May 11, 2021 · US
Method for distilling a gas stream containing oxygen
US-2021086129-A1 · Mar 25, 2021 · US
Facility for the treatment of a stream of methane and carbon dioxide by means of a vane-type compressor and of a membrane separation unit
US-2020407653-A1 · Dec 31, 2020 · US
Method and system for purification of natural gas using membranes
US-10874979-B2 · Dec 29, 2020 · US
Treatment of a methane stream comprising vocs and carbon dioxide by a combination of an adsorption unit and a membrane separation unit
US-2020398217-A1 · Dec 24, 2020 · US
Process for natural gas production
US-2020347311-A1 · Nov 5, 2020 · US
Production of biomethane using a high recovery module
US-2020206680-A1 · Jul 2, 2020 · US
Facility and method for the treatment by membrane permeation of a gas stream with adjustment of the third-permeate suctioning pressure
US-2020188843-A1 · Jun 18, 2020 · US
Installation and method for the treatment by membrane permeation of a gas stream with the aspiration pressure of the second permeate adjusted
US-2020188841-A1 · Jun 18, 2020 · US
Method and system for light olefin separation
US-10683246-B2 · Jun 16, 2020 · US
Production of biomethane using a high recovery module
US-10569217-B2 · Feb 25, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D53/225?
- CPC B01D53/225 is the Cooperative Patent Classification code for “Multiple stage diffusion.”
- How many patents are filed under CPC B01D53/225 (Multiple stage diffusion)?
- Our database includes 104 publications tagged with this CPC code.
- Is patent activity under CPC B01D53/225 growing?
- Publication counts under this code: 6 in 2024 vs 6 in 2025 (latest complete years).