Refractory lining design for magnetic separation
US-2024416360-A1 · Dec 19, 2024 · US
Spheres
Spheres · 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 | C04B2235/528 |
| Official title | Spheres |
| Display label | Spheres |
| Total patents | 315 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 23 |
| 2016 | 27 |
| 2017 | 19 |
| 2018 | 28 |
| 2019 | 31 |
| 2020 | 25 |
| 2021 | 34 |
| 2022 | 31 |
| 2023 | 29 |
| 2024 | 33 |
| 2025 | 28 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Sintered body and electrostatic chuck
US-2017358476-A1 · Dec 14, 2017 · US
Ceramic and preparation method therefor
US-2017327425-A1 · Nov 16, 2017 · US
Light weight proppant with improved strength and methods of making same
US-9796915-B2 · Oct 24, 2017 · US
Powder material for powder additive manufacturing and powder additive manufacturing method using same
US-2017189960-A1 · Jul 6, 2017 · US
Synthesis of a homogeneously porous solid oxide matrix with tunable porosity and pore size
US-9650301-B1 · May 16, 2017 · US
Piezoelectric oriented ceramics and method of manufacturing the same
US-9647198-B2 · May 9, 2017 · US
Porous ceramic article and method of manufacturing the same
US-9623360-B2 · Apr 18, 2017 · US
Hard-facing for downhole tools and matrix bit bodies with enhanced wear resistance and fracture toughness
US-9604345-B2 · Mar 28, 2017 · US
Proppant bead forming methods
US-2017066962-A1 · Mar 9, 2017 · US
Proppants and Methods of Making the Same
US-2016376199-A1 · Dec 29, 2016 · US
Density enhancement methods and compositions
US-2016368057-A1 · Dec 22, 2016 · US
Pyrolysis Reactor Materials and Methods
US-2016340257-A1 · Nov 24, 2016 · US
Method for Manufacturing Composite Ceramic Material
US-2016329573-A1 · Nov 10, 2016 · US
Ceramic-ceramic composites and process therefor, nuclear fuels formed thereby, and nuclear reactor systems and processes operated therewith
US-9466398-B2 · Oct 11, 2016 · US
Ceramic particles formed from perforated membranes
US-2016272880-A1 · Sep 22, 2016 · US
Pyrolysis reactor materials and methods
US-9441166-B2 · Sep 13, 2016 · US
Ceramic composite beads and methods for making same
US-2016251249-A1 · Sep 1, 2016 · US
Method of fabricating silicon carbide powder
US-9416012-B2 · Aug 16, 2016 · US
Electrolyte Forming Process
US-2016233535-A1 · Aug 11, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B2235/528?
- CPC C04B2235/528 is the Cooperative Patent Classification code for “Spheres.”
- How many patents are filed under CPC C04B2235/528 (Spheres)?
- Our database includes 315 publications tagged with this CPC code.
- Is patent activity under CPC C04B2235/528 growing?
- Publication counts under this code: 33 in 2024 vs 28 in 2025 (latest complete years).