Method for producing polycrystalline alumina abrasive grains
US-2026042945-A1 · Feb 12, 2026 · US
in presence of a calcination additive
in presence of a calcination additive · 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 | C01F7/442 |
| Official title | in presence of a calcination additive |
| Display label | in presence of a calcination additive |
| Total patents | 50 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 8 |
| 2018 | 5 |
| 2019 | 7 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Composite particle and method of producing composite particle
US-12486176-B2 · Dec 2, 2025 · US
Plate-like alumina particle and method for manufacturing plate-like alumina particle
US-12459830-B2 · Nov 4, 2025 · US
Methods of forming substantially all platelet alumina powders and alumina carriers
US-2025282686-A1 · Sep 11, 2025 · US
Polycrystalline alumina abrasive grains, method for producing the same, and grindstone
US-2025163309-A1 · May 22, 2025 · US
Alumina-based thermally conductive rounded-disc-shaped particles, production method for same, thermally conductive composition, article, liquid composition, thermally conductive thin film, and electronic device member
US-2025109071-A1 · Apr 3, 2025 · US
Alumina powder
US-2025026660-A1 · Jan 23, 2025 · US
High-purity microparticle alumina powder
US-2024409426-A1 · Dec 12, 2024 · US
Flaky alumina particles and method for producing flaky alumina particles
US-11926531-B2 · Mar 12, 2024 · US
Tabular alumina particles and method of producing tabular alumina particles
US-11905420-B2 · Feb 20, 2024 · US
Abrasive particles having an elongated body comprising a twist along an axis of the body
US-11859120-B2 · Jan 2, 2024 · US
Abrasive particles having an elongated body comprising a twist along an axis of the body
US-2023357617-A9 · Nov 9, 2023 · US
Strontium-catalyzed boehmite formation
US-2023271844-A1 · Aug 31, 2023 · US
Abrasive particles having complex shapes and methods of forming same
US-2023272254-A1 · Aug 31, 2023 · US
Abrasive particles having complex shapes and methods of forming same
US-11649388-B2 · May 16, 2023 · US
Composite particle and method of producing composite particle
US-2023131773-A1 · Apr 27, 2023 · US
Resin composition for molding and molded body
US-2023111598-A1 · Apr 13, 2023 · US
Plate-like alumina particle and method for manufacturing plate-like alumina particle
US-2023096825-A1 · Mar 30, 2023 · US
Alumina particle production method
US-2022315439-A1 · Oct 6, 2022 · US
Alumina particle
US-11401169-B2 · Aug 2, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01F7/442?
- CPC C01F7/442 is the Cooperative Patent Classification code for “in presence of a calcination additive.”
- How many patents are filed under CPC C01F7/442 (in presence of a calcination additive)?
- Our database includes 50 publications tagged with this CPC code.
- Is patent activity under CPC C01F7/442 growing?
- Publication counts under this code: 4 in 2024 vs 6 in 2025 (latest complete years).