Crucible for growing sapphire single crystal, and method for producing crucible for growing sapphire single crystal
US-9803291-B2 · Oct 31, 2017 · US
Aluminium oxides
Aluminium oxides · 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 | C30B29/20 |
| Official title | Aluminium oxides |
| Display label | Aluminium oxides |
| Total patents | 267 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 19 |
| 2016 | 30 |
| 2017 | 38 |
| 2018 | 31 |
| 2019 | 25 |
| 2020 | 24 |
| 2021 | 16 |
| 2022 | 22 |
| 2023 | 22 |
| 2024 | 15 |
| 2025 | 20 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Surface-coated cutting tool
US-2017268124-A1 · Sep 21, 2017 · US
Thin Film Device Fabrication Methods and Apparatus
US-2017271185-A1 · Sep 21, 2017 · US
Sapphire substrate and method for manufacturing the same and nitride semiconductor light emitting element
US-9711685-B2 · Jul 18, 2017 · US
Apparatus for forming single crystal sapphire
US-2017183792-A1 · Jun 29, 2017 · US
Rhombohedron Epitaxial Growth with Molten Target Sputtering
US-2017145589-A1 · May 25, 2017 · US
Transparent ceramic with complex geometry
US-2017107154-A1 · Apr 20, 2017 · US
Sapphire component with residual compressive stress
US-9623628-B2 · Apr 18, 2017 · US
α-alumina particles and method for manufacturing the same
US-9604852-B2 · Mar 28, 2017 · US
Nitrogen-polar semipolar gan layers and devices on sapphire substrates
US-2017047220-A1 · Feb 16, 2017 · US
Sapphire sheets and apparatus and method for producing sapphire sheets with angled heat shields
US-9551089-B2 · Jan 24, 2017 · US
Device for manufacturing semiconductor or metallic oxide ingot
US-9528195-B2 · Dec 27, 2016 · US
System for heat treating a sapphire component
US-2016368808-A1 · Dec 22, 2016 · US
Method for forming identification marks on refractory material single crystal substrate, and refractory material single crystal substrate
US-9508655-B2 · Nov 29, 2016 · US
Composite Substrate, Light Emitting Element, and Methods for Manufacturing Composite Substrate and Light Emitting Element
US-2016343906-A1 · Nov 24, 2016 · US
Manufacturing method of double cladding crystal fiber
US-9499922-B2 · Nov 22, 2016 · US
Sapphire substrate and method for manufacturing the same and nitride semiconductor light emitting element
US-2016300982-A1 · Oct 13, 2016 · US
Single crystal growing apparatus
US-2016298260-A1 · Oct 13, 2016 · US
Sapphire substrate
US-9464365-B2 · Oct 11, 2016 · US
Metallic crucibles and methods of forming the same
US-9457405-B2 · Oct 4, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C30B29/20?
- CPC C30B29/20 is the Cooperative Patent Classification code for “Aluminium oxides.”
- How many patents are filed under CPC C30B29/20 (Aluminium oxides)?
- Our database includes 267 publications tagged with this CPC code.
- Is patent activity under CPC C30B29/20 growing?
- Publication counts under this code: 15 in 2024 vs 20 in 2025 (latest complete years).