Carbon composites, methods of manufacture, and uses thereof
US-9505151-B2 · Nov 29, 2016 · US
Refractory metals
Refractory metals · 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 | C04B2235/404 |
| Official title | Refractory metals |
| Display label | Refractory metals |
| Total patents | 428 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 26 |
| 2016 | 44 |
| 2017 | 39 |
| 2018 | 31 |
| 2019 | 36 |
| 2020 | 37 |
| 2021 | 50 |
| 2022 | 40 |
| 2023 | 45 |
| 2024 | 41 |
| 2025 | 29 |
| 2026 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Metal-free monolithic epitaxial graphene-on-diamond PWB
US-9504158-B2 · Nov 22, 2016 · US
Diamond polycrystalline body and method for manufacturing the same, and tool
US-9487447-B2 · Nov 8, 2016 · US
Composition for a novel grade for cutting tools
US-2016318811-A1 · Nov 3, 2016 · US
Refractory composite comprising a geopolymer and method of making a refractory composite
US-2016304402-A1 · Oct 20, 2016 · US
Refractory metal boride ceramics and methods of making thereof
US-9469572-B2 · Oct 18, 2016 · US
Method for preparing titanium nitride-titanium diboride-cubic boron nitride composite material
US-2016297713-A1 · Oct 13, 2016 · US
Piezoelectric/electrostrictive material, piezoelectric/electrostrictive body, and resonance driving device
US-2016293832-A1 · Oct 6, 2016 · US
Dielectric ceramic composition and multilayer ceramic capacitor comprising the same
US-9424991-B2 · Aug 23, 2016 · US
Cubic boron nitride sintered body and coated cubic boron nitride sintered body
US-2016236988-A1 · Aug 18, 2016 · US
Refractory metal ceramics and methods of making thereof
US-9403723-B2 · Aug 2, 2016 · US
Metal-free monolithic epitaxial graphene-on-diamond PWB with optical waveguide
US-9402322-B1 · Jul 26, 2016 · US
Zinc oxide sintered compact, sputtering target, and zinc oxide thin film
US-9396830-B2 · Jul 19, 2016 · US
Surface-coated boron nitride sintered body tool
US-2016194254-A1 · Jul 7, 2016 · US
Methods of fabricating polycrystalline diamond compacts
US-9381620-B1 · Jul 5, 2016 · US
Metal nitride material for thermistor, method for producing same, and film-type thermistor sensor
US-2016189831-A1 · Jun 30, 2016 · US
Metal nitride material for thermistor, method for producing same, and film-type thermistor sensor
US-2016187205-A1 · Jun 30, 2016 · US
Method for making ceramic matrix composite articles with progressive melt infiltration
US-2016175960-A1 · Jun 23, 2016 · US
Boron nitride agglomerates, method for the production thereof and use thereof
US-9371449-B2 · Jun 21, 2016 · US
Titanate and titania nanostructures and nanostructure assemblies, and methods of making same
US-9365432-B2 · Jun 14, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B2235/404?
- CPC C04B2235/404 is the Cooperative Patent Classification code for “Refractory metals.”
- How many patents are filed under CPC C04B2235/404 (Refractory metals)?
- Our database includes 428 publications tagged with this CPC code.
- Is patent activity under CPC C04B2235/404 growing?
- Publication counts under this code: 41 in 2024 vs 29 in 2025 (latest complete years).