Porous electrode substrate and process for production thereof, porous electrode substrate precursor sheet, membrane-electrode assembly, and polymer electrolyte fuel cell
US-9780383-B2 · Oct 3, 2017 · US
Oxidative annealing
Oxidative annealing · 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 | C04B2235/663 |
| Official title | Oxidative annealing |
| Display label | Oxidative annealing |
| Total patents | 418 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 31 |
| 2016 | 26 |
| 2017 | 22 |
| 2018 | 22 |
| 2019 | 31 |
| 2020 | 42 |
| 2021 | 44 |
| 2022 | 59 |
| 2023 | 55 |
| 2024 | 39 |
| 2025 | 36 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ceramic materials for gas separation and oxygen storage
US-9764985-B2 · Sep 19, 2017 · US
Oxide ceramic and ceramic electronic component
US-2017069413-A1 · Mar 9, 2017 · US
Phosphor Ceramic Element
US-2016355732-A1 · Dec 8, 2016 · US
Light extraction element
US-9499740-B2 · Nov 22, 2016 · US
Piezoelectric material, piezoelectric element, and electronic apparatus
US-2016315245-A1 · Oct 27, 2016 · US
Silicon carbide porous material, honeycomb structure and electric heating-type catalyst carrier
US-9457345-B2 · Oct 4, 2016 · US
Dielectric ceramic composition and multilayer ceramic capacitor including the same
US-9458063-B2 · Oct 4, 2016 · US
Dielectric ceramic composition and multilayer ceramic capacitor comprising the same
US-9424991-B2 · Aug 23, 2016 · US
Dielectric composition and multilayer ceramic capacitor containing the same
US-2016221878-A1 · Aug 4, 2016 · US
Refractory metal ceramics and methods of making thereof
US-9403723-B2 · Aug 2, 2016 · US
Multilayer ceramic capacitor
US-2016217924-A1 · Jul 28, 2016 · US
Ceria-zirconia base composite oxide, method for producing the same, and catalyst for purification of exhaust gas using the ceria-zirconia base composite oxide
US-9376327-B2 · Jun 28, 2016 · US
Oxide ceramic and ceramic electronic component
US-2016155562-A1 · Jun 2, 2016 · US
Honeycomb structure and manufacturing method thereof
US-9339799-B2 · May 17, 2016 · US
Porous electrode substrate and process for production thereof, porous electrode substrate precursor sheet, membrane-electrode assembly, and polymer electrolyte fuel cell
US-9325016-B2 · Apr 26, 2016 · US
Multilayer ceramic capacitor
US-9312070-B2 · Apr 12, 2016 · US
Dielectric ceramic composition and multilayer ceramic capacitor comprising the same
US-2016086735-A1 · Mar 24, 2016 · US
Honeycomb structure and manufacturing method of the same
US-9289722-B2 · Mar 22, 2016 · US
Porous material, manufacturing method of the same, and honeycomb structure
US-9289707-B2 · Mar 22, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B2235/663?
- CPC C04B2235/663 is the Cooperative Patent Classification code for “Oxidative annealing.”
- How many patents are filed under CPC C04B2235/663 (Oxidative annealing)?
- Our database includes 418 publications tagged with this CPC code.
- Is patent activity under CPC C04B2235/663 growing?
- Publication counts under this code: 39 in 2024 vs 36 in 2025 (latest complete years).