Materials systems for inhibiting penetration of molten salts, methods therefor, and devices provided therewith
US-2021340070-A1 · Nov 4, 2021 · US
Sulphates or sulphites
Sulphates or sulphites · 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 | C04B2235/448 |
| Official title | Sulphates or sulphites |
| Display label | Sulphates or sulphites |
| Total patents | 99 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 10 |
| 2017 | 11 |
| 2018 | 8 |
| 2019 | 12 |
| 2020 | 10 |
| 2021 | 11 |
| 2022 | 7 |
| 2023 | 7 |
| 2024 | 11 |
| 2025 | 8 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing solid composition and method for producing functional ceramic
US-2021300826-A1 · Sep 30, 2021 · US
Castable refractory compositions comprising zeolithic microstructures and uses thereof
US-11130711-B2 · Sep 28, 2021 · US
Doped beo compounds for optically stimulated luminescence (osl) and thermoluminescence (tl) radiation dosimetry
US-2021261861-A1 · Aug 26, 2021 · US
Method of Masking a Dental Support Structure of a Dental Prosthesis Made of Highly Translucent Ceramic Material
US-2021236389-A1 · Aug 5, 2021 · US
Refractory ceramic product, batch for the manufacture such a product and method for manufacturing such a product
US-11053165-B2 · Jul 6, 2021 · US
Positive electrode active material for non-aqueous electrolyte secondary battery and method of producing the same
US-2020343534-A1 · Oct 29, 2020 · US
High permeable zirconia blank capable of sintering at high speed
US-2020331807-A1 · Oct 22, 2020 · US
Mineral treatment process
US-2020306729-A1 · Oct 1, 2020 · US
Method for preparing thinning ceramic additive using landfill leachate
US-10759686-B2 · Sep 1, 2020 · US
Positive electrode active material for non-aqueous electrolyte secondary battery and method of producing the same
US-10749165-B2 · Aug 18, 2020 · US
Refractory batch, a method for producing an unshaped refractory ceramic product from the batch and an unshaped refractory ceramic product obtained by the method
US-2020207665-A1 · Jul 2, 2020 · US
Granular material, granular material manufacturing method, three-dimensional laminated and shaped mold manufacturing apparatus, and three-dimensional laminated and shaped mold manufacturing method
US-10654991-B2 · May 19, 2020 · US
Ceramic material for multilayer ceramic capacitor and method of making the same
US-10562819-B2 · Feb 18, 2020 · US
Refractory ceramic product, batch for the manufacture such a product and method for manufacturing such a product
US-2020039885-A1 · Feb 6, 2020 · US
Method of preparing silicon carbide and filters made therefrom
US-2020002177-A1 · Jan 2, 2020 · US
Honeycomb structure and method for manufacturing the same
US-10507457-B2 · Dec 17, 2019 · US
Batch for producing an unshaped refractory ceramic product, method for producing an unshaped refractory ceramic product, and an unshaped refractory ceramic product produced thereby
US-2019375686-A1 · Dec 12, 2019 · US
Annealing separating agent composition for grain-oriented electrical steel sheet, grain-oriented electrical steel sheet, and method for manufacturing grain oriented electrical steel sheet
US-2019276911-A1 · Sep 12, 2019 · US
Method for preparing thinning ceramic additive using landfill leachate
US-2019263698-A1 · Aug 29, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B2235/448?
- CPC C04B2235/448 is the Cooperative Patent Classification code for “Sulphates or sulphites.”
- How many patents are filed under CPC C04B2235/448 (Sulphates or sulphites)?
- Our database includes 99 publications tagged with this CPC code.
- Is patent activity under CPC C04B2235/448 growing?
- Publication counts under this code: 11 in 2024 vs 8 in 2025 (latest complete years).