Porous hollow fiber membrane
US-2018369757-A1 · Dec 27, 2018 · US
Thermal or heat-resistance properties
Thermal or heat-resistance properties · 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 | B01D2325/22 |
| Official title | Thermal or heat-resistance properties |
| Display label | Thermal or heat-resistance properties |
| Total patents | 204 |
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 | 12 |
| 2016 | 19 |
| 2017 | 19 |
| 2018 | 15 |
| 2019 | 20 |
| 2020 | 18 |
| 2021 | 31 |
| 2022 | 21 |
| 2023 | 16 |
| 2024 | 19 |
| 2025 | 12 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Separation membrane, sheet channel material, and separation membrane element
US-10159942-B2 · Dec 25, 2018 · US
Method of preparing perm-selective porous membrane and method of separating gases using porous membrane prepared thereby
US-2018272288-A1 · Sep 27, 2018 · US
Polyolefin microporous membrane and production method thereof
US-10079378-B2 · Sep 18, 2018 · US
Porous Air Permeable Polytetrafluoroethylene Composites with Improved Mechanical and Thermal Properties
US-2018163089-A1 · Jun 14, 2018 · US
Method of manufacturing composite film
US-2018111158-A1 · Apr 26, 2018 · US
Porous Air Permeable Polytetrafluoroethylene Composites with Improved Mechanical and Thermal Properties
US-2018079929-A1 · Mar 22, 2018 · US
Black Liquor Concentration by a Membrane Comprising Graphene Oxide on Porous Polymer
US-2018071684-A1 · Mar 15, 2018 · US
Asymmetric Modified Carbon Molecular Sieve Hollow Fiber Membranes Having Improved Permeance
US-2018071691-A1 · Mar 15, 2018 · US
Porous air permeable polytetrafluoroethylene composites with improved mechanical and thermal properties
US-9862859-B2 · Jan 9, 2018 · US
Polyolefin multilayer microporous membrane and battery separator
US-9843030-B2 · Dec 12, 2017 · US
Asymmetric modified carbon molecular sieve hollow fiber membranes having improved permeance
US-9815030-B2 · Nov 14, 2017 · US
Ceramic filter
US-9802143-B2 · Oct 31, 2017 · US
Hollow fiber membrane and hollow fiber membrane module
US-2017266624-A1 · Sep 21, 2017 · US
Porous ABPBI [phosphoric acid doped poly (2, 5-benzimidazole)] membrane and process of preparing the same
US-9757696-B2 · Sep 12, 2017 · US
Microporous polymeric membranes, battery separators, and production methods therefor
US-9744500-B2 · Aug 29, 2017 · US
Process for making membranes
US-2017239627-A1 · Aug 24, 2017 · US
Electrode-support type of gas-separation membrane module, tubular structure of same, production method for tubular structure, and hydrocarbon reforming method using same
US-9724640-B2 · Aug 8, 2017 · US
Porous abpbi [phosphoric acid doped poly (2, 5-benzimidazole)] membrane and process of preparing the same
US-2017209839-A9 · Jul 27, 2017 · US
Composite semipermeable membrane
US-2017203262-A1 · Jul 20, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2325/22?
- CPC B01D2325/22 is the Cooperative Patent Classification code for “Thermal or heat-resistance properties.”
- How many patents are filed under CPC B01D2325/22 (Thermal or heat-resistance properties)?
- Our database includes 204 publications tagged with this CPC code.
- Is patent activity under CPC B01D2325/22 growing?
- Publication counts under this code: 19 in 2024 vs 12 in 2025 (latest complete years).