Ethylenically unsaturated oligomers, methods for their preparation, and the use thereof in coating compositions
US-2025215139-A1 · Jul 3, 2025 · US
containing germanium
containing germanium · 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 | C03C2201/31 |
| Official title | containing germanium |
| Display label | containing germanium |
| Total patents | 50 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 11 |
| 2018 | 2 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 8 |
| 2022 | 6 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Glass material and optical fiber
US-2024377577-A1 · Nov 14, 2024 · US
Optical fiber including intra-cladding barrier layer
US-2024353613-A1 · Oct 24, 2024 · US
Resin composition, optical fiber, and method for manufacturing optical fiber
US-12054629-B2 · Aug 6, 2024 · US
Radiation-resistant laser optical fiber preform core rod and preparation method therefor
US-12001052-B2 · Jun 4, 2024 · US
Optical fiber
US-11960115-B2 · Apr 16, 2024 · US
Optical glass and optical element
US-2023121192-A1 · Apr 20, 2023 · US
Optical interference filter
US-2023095480-A1 · Mar 30, 2023 · US
Radiation-resistant laser optical fiber preform core rod and preparation method therefor
US-2022342147-A1 · Oct 27, 2022 · US
Optical fiber
US-11467340-B2 · Oct 11, 2022 · US
Optical fiber
US-11460632-B2 · Oct 4, 2022 · US
Process of fabrication of Erbium and Ytterbium-co-doped multi-elements silica glass based cladding-pumped fiber
US-11407671-B2 · Aug 9, 2022 · US
Resin composition, secondary coating material of optical fiber, optical fiber, and method for producing optical fiber
US-2022066095-A1 · Mar 3, 2022 · US
Optical fiber
US-2022011505-A1 · Jan 13, 2022 · US
Coupled multicore optical fiber
US-11156770-B2 · Oct 26, 2021 · US
Resin composition, optical fiber, and method for manufacturing optical fiber
US-2021198517-A1 · Jul 1, 2021 · US
Optical fiber
US-2021157049-A1 · May 27, 2021 · US
Optical fiber
US-2021149107-A1 · May 20, 2021 · US
Optical fiber
US-2021096297-A1 · Apr 1, 2021 · US
Optical device production method
US-2021080650-A1 · Mar 18, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03C2201/31?
- CPC C03C2201/31 is the Cooperative Patent Classification code for “containing germanium.”
- How many patents are filed under CPC C03C2201/31 (containing germanium)?
- Our database includes 50 publications tagged with this CPC code.
- Is patent activity under CPC C03C2201/31 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).