Transparent ceramic with complex geometry
US-10875812-B2 · Dec 29, 2020 · US
After-treatment of oxides or hydroxides
After-treatment of oxides or hydroxides · 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 | C01F7/021 |
| Official title | After-treatment of oxides or hydroxides |
| Display label | After-treatment of oxides or hydroxides |
| Total patents | 157 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 8 |
| 2017 | 16 |
| 2018 | 14 |
| 2019 | 14 |
| 2020 | 19 |
| 2021 | 10 |
| 2022 | 19 |
| 2023 | 17 |
| 2024 | 19 |
| 2025 | 13 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
α-alumina flakes
US-10647861-B2 · May 12, 2020 · US
High surface area crystalline metal aluminates and a method of manufacture thereof at lower temperature
US-2020123018-A1 · Apr 23, 2020 · US
Waterborne aerogel and method for producing same
US-10544048-B2 · Jan 28, 2020 · US
Method for producing a porous monolithic material
US-10500313-B2 · Dec 10, 2019 · US
Highly active sorbents and oxygen carriers supported by calcined alumina aerogel for low-temperature carbon capture and chemical-looping combustion of methane
US-2019358606-A1 · Nov 28, 2019 · US
Laser-colored sapphire material
US-10464843-B2 · Nov 5, 2019 · US
Alpha-alumina flakes
US-2019330475-A1 · Oct 31, 2019 · US
α-alumina flakes
US-10457812-B2 · Oct 29, 2019 · US
Alpha-alumina flakes
US-2019322871-A1 · Oct 24, 2019 · US
Surface treatment method of ceramic powder using microwave plasma for enhancing flowability
US-2019300998-A1 · Oct 3, 2019 · US
Process to peptize alumina for fluidizable catalysts
US-2019184375-A1 · Jun 20, 2019 · US
Superoleophobic alumina coatings
US-10301482-B2 · May 28, 2019 · US
Alumina and method for producing automotive catalyst using same
US-2019152795-A1 · May 23, 2019 · US
Segmented Ceramic Coatings and Methods
US-2019078463-A1 · Mar 14, 2019 · US
Methods for processing fumed metallic oxides
US-10227237-B2 · Mar 12, 2019 · US
Method for producing a plate-like alumina power
US-10221076-B2 · Mar 5, 2019 · US
Method for producing an alumina gel having a high dispersibility and a specific crystallite size
US-2019055135-A1 · Feb 21, 2019 · US
Alumina and slurry containing the same, and alumina porous film using the same, laminated separator, nonaqueous electrolyte secondary battery and method for manufacturing nonaqueous electrolyte secondary battery
US-2018351147-A1 · Dec 6, 2018 · US
Spherical alumina powder and resin composition using same
US-10144816-B2 · Dec 4, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01F7/021?
- CPC C01F7/021 is the Cooperative Patent Classification code for “After-treatment of oxides or hydroxides.”
- How many patents are filed under CPC C01F7/021 (After-treatment of oxides or hydroxides)?
- Our database includes 157 publications tagged with this CPC code.
- Is patent activity under CPC C01F7/021 growing?
- Publication counts under this code: 19 in 2024 vs 13 in 2025 (latest complete years).