Separation membrane structure
US-10478783-B2 · Nov 19, 2019 · US
Pore shapes
Pore shapes · 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 | B01D2325/021 |
| Official title | Pore shapes |
| Display label | Pore shapes |
| Total patents | 199 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 10 |
| 2017 | 17 |
| 2018 | 14 |
| 2019 | 15 |
| 2020 | 28 |
| 2021 | 24 |
| 2022 | 16 |
| 2023 | 21 |
| 2024 | 23 |
| 2025 | 20 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Porous and nanoporous semiconductor materials and manufacture thereof
US-2019312112-A1 · Oct 10, 2019 · US
Filtration filter, filtration method, production method of purified liquid chemical product for lithography, and method of forming resist pattern
US-10429738-B2 · Oct 1, 2019 · US
Cell filtration filter
US-2019185804-A1 · Jun 20, 2019 · US
Composite porous hollow fiber membrane, production method for composite porous hollow fiber membrane, composite porous hollow fiber membrane module, and operation method for composite porous hollow fiber membrane module
US-2019168167-A1 · Jun 6, 2019 · US
Mixed matrix membrane, a method of making thereof, and a method for gas separation
US-10188981-B2 · Jan 29, 2019 · US
A method of forming a thin film through-hole membrane
US-2019022595-A1 · Jan 24, 2019 · US
Method for producing porous polyimide film
US-10177357-B2 · Jan 8, 2019 · US
Porous support, method for manufacturing porous support, separation membrane structure, and method for manufacturing separation membrane structure
US-2019001278-A1 · Jan 3, 2019 · US
Purification method for purifying liquid, purification method for purifying silicon compound-containing liquid, method for producing silylating agent liquid, film forming material or diffusing agent composition, filter medium and filter device
US-2018311622-A1 · Nov 1, 2018 · US
Filter for filtering nucleated cells and filtering method using the same
US-2018312803-A1 · Nov 1, 2018 · US
Mixed matrix membrane, a method of making thereof, and a method for gas separation
US-2018304193-A1 · Oct 25, 2018 · US
System and methods of processing liquid therein
US-2018290106-A1 · Oct 11, 2018 · US
Island etched filter passages
US-10086317-B2 · Oct 2, 2018 · US
Porous film and method for producing same
US-2018250640-A1 · Sep 6, 2018 · US
Nanoporous lyotropic liquid crystal polymer membranes with reversibly tuned pore size and selectivity, and methods using same
US-2018208728-A1 · Jul 26, 2018 · US
Multiblock copolymers and methods of use
US-10022679-B2 · Jul 17, 2018 · US
Filter membrane
US-2018154317-A1 · Jun 7, 2018 · US
Porous electrolyte membrane, manufacturing process thereof and electrochemical devices comprising same
US-2018115014-A1 · Apr 26, 2018 · US
Hollow fiber membrane and method of preparing the same
US-2018085713-A1 · Mar 29, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2325/021?
- CPC B01D2325/021 is the Cooperative Patent Classification code for “Pore shapes.”
- How many patents are filed under CPC B01D2325/021 (Pore shapes)?
- Our database includes 199 publications tagged with this CPC code.
- Is patent activity under CPC B01D2325/021 growing?
- Publication counts under this code: 23 in 2024 vs 20 in 2025 (latest complete years).