System, process and related sintered article
US-2021380430-A1 · Dec 9, 2021 · US
by calcination
by calcination · 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 | C01F7/441 |
| Official title | by calcination |
| Display label | by calcination |
| Total patents | 122 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 4 |
| 2017 | 15 |
| 2018 | 8 |
| 2019 | 12 |
| 2020 | 12 |
| 2021 | 10 |
| 2022 | 17 |
| 2023 | 17 |
| 2024 | 13 |
| 2025 | 9 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
α-alumina flakes
US-11142649-B2 · Oct 12, 2021 · US
Alumina having acidity and structure with a porosity which are optimal
US-11110431-B2 · Sep 7, 2021 · US
System, process and related sintered article
US-2021253439-A1 · Aug 19, 2021 · US
System, process and related sintered article
US-11014822-B2 · May 25, 2021 · US
Porous aluminum hydrate
US-2021070623-A1 · Mar 11, 2021 · US
Gel with high dispersibility and method for preparing same
US-10858262-B2 · Dec 8, 2020 · US
Method of using a screen containing a composite for release of well treatment agent into a well
US-10822536-B2 · Nov 3, 2020 · US
Alpha-alumina flakes
US-2020231827-A1 · Jul 23, 2020 · US
Alpha-alumina flakes
US-2020231828-A1 · Jul 23, 2020 · US
Tetrahedral abrasive particles in abrasive articles
US-2020199425-A1 · Jun 25, 2020 · US
Mesoporous and macroporous nickel-based catalyst having a median macropore diameter of between 50 nm and 200 nm and its use with regard to hydrogenation
US-10668451-B2 · Jun 2, 2020 · 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-10662071-B2 · May 26, 2020 · US
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
Composition including a plurality of abrasive particles and method of using same
US-2020048516-A1 · Feb 13, 2020 · US
Particulate materials and methods of forming same
US-2020048517-A1 · Feb 13, 2020 · US
Alumina having acidity and structure with a porosity which are optimal
US-2020030773-A1 · Jan 30, 2020 · 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
Alpha-alumina flakes
US-2019330475-A1 · Oct 31, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01F7/441?
- CPC C01F7/441 is the Cooperative Patent Classification code for “by calcination.”
- How many patents are filed under CPC C01F7/441 (by calcination)?
- Our database includes 122 publications tagged with this CPC code.
- Is patent activity under CPC C01F7/441 growing?
- Publication counts under this code: 13 in 2024 vs 9 in 2025 (latest complete years).