Ceramic base material, ceramic support, and separation membrane complex
US-2024399316-A1 · Dec 5, 2024 · US
expressed as porosity percentage
expressed as porosity percentage · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C04B38/0074 |
| Official title | {expressed as porosity percentage} |
| Display label | expressed as porosity percentage |
| Total patents | 347 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 35 |
| 2016 | 35 |
| 2017 | 27 |
| 2018 | 37 |
| 2019 | 40 |
| 2020 | 37 |
| 2021 | 26 |
| 2022 | 24 |
| 2023 | 27 |
| 2024 | 30 |
| 2025 | 21 |
| 2026 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Porous carbon product with layer composite structure
US-9520594-B2 · Dec 13, 2016 · US
Plugged honeycomb structure
US-9506384-B2 · Nov 29, 2016 · US
Composite oxygen transport membrane
US-9492784-B2 · Nov 15, 2016 · US
Composite oxygen transport membrane
US-9486735-B2 · Nov 8, 2016 · US
Closed pore ceramic composite article
US-9447503-B2 · Sep 20, 2016 · US
Silicon carbide porous body, honeycomb structure, and electric heating type catalyst carrier
US-9440225-B2 · Sep 13, 2016 · US
Lithium secondary battery and cathode of the lithium secondary battery with conductive bonding layer
US-9425454-B2 · Aug 23, 2016 · US
Cordierite porous ceramic honeycomb articles with delayed microcrack evolution
US-9409826-B2 · Aug 9, 2016 · US
Electrical power storage system using hydrogen and method for storing electrical power using hydrogen
US-9362576-B2 · Jun 7, 2016 · US
Ceramic honeycomb structure and its production method
US-9353015-B2 · May 31, 2016 · US
SiC ceramic material, SiC ceramic structure, and their fabrication methods
US-9353013-B2 · May 31, 2016 · US
Porous material and honeycomb structure
US-9346714-B2 · May 24, 2016 · US
Method for the preparation of a catalysed particulate filter and catalysed particulate filter
US-9339844-B2 · May 17, 2016 · US
Methods of flash sintering
US-9334194-B2 · May 10, 2016 · US
Sintered refractory material based on silicon carbide with a silicon nitride binder
US-9321690-B2 · Apr 26, 2016 · US
Cordierite forming batch compositions and cordierite bodies manufactured therefrom
US-9314727-B2 · Apr 19, 2016 · US
Porous material, manufacturing method of the same, and honeycomb structure
US-9289707-B2 · Mar 22, 2016 · US
Filter comprising combined soot oxidation and NH3-SCR catalyst
US-9283519-B2 · Mar 15, 2016 · US
Nano-porous corundum ceramics and methods of manufacture
US-2016060179-A1 · Mar 3, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B38/0074?
- CPC C04B38/0074 is the Cooperative Patent Classification code for “expressed as porosity percentage.”
- How many patents are filed under CPC C04B38/0074 (expressed as porosity percentage)?
- Our database includes 347 publications tagged with this CPC code.
- Is patent activity under CPC C04B38/0074 growing?
- Publication counts under this code: 30 in 2024 vs 21 in 2025 (latest complete years).