Optical fiber with reduced attenuation due to reduced absorption contribution
US-2026063835-A1 · Mar 5, 2026 · US
Impurity concentration specified
Impurity concentration specified · 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 | C03B2201/07 |
| Official title | Impurity concentration specified |
| Display label | Impurity concentration specified |
| Total patents | 58 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 6 |
| 2019 | 11 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 10 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing crystallized glass member having curved shape
US-12565440-B2 · Mar 3, 2026 · US
Silica glass porous body and manufacturing method therefor
US-2025388508-A1 · Dec 25, 2025 · US
Titanium-containing quartz glass having excellent UV absorption, and method for producing same
US-12286374-B2 · Apr 29, 2025 · US
Tubular composite body of quartz glass and method for producing and using the same
US-2025051211-A1 · Feb 13, 2025 · US
Tubular composite body made of quartz glass and method for producing and using the same
US-2025051222-A1 · Feb 13, 2025 · US
Optical Fiber Drawing Apparatus and Method Thereof
US-2025002391-A1 · Jan 2, 2025 · US
Method of manufacturing a porous glass body to lower attenuation of optical fiber made therefrom
US-2024360025-A1 · Oct 31, 2024 · US
Cleaning step to remove metals or metal oxides from porous glass body
US-2024360024-A1 · Oct 31, 2024 · US
Method for producing crystallized glass member having curved shape
US-2024018029-A1 · Jan 18, 2024 · US
Method for producing optical fiber preform, and optical fiber preform
US-2023167003-A1 · Jun 1, 2023 · US
Method for producing optical fiber preform, and optical fiber preform
US-11591252-B2 · Feb 28, 2023 · US
Preparation of quartz glass bodies with dew point monitoring in the melting oven
US-11492282-B2 · Nov 8, 2022 · US
Preparation of quartz glass bodies from silicon dioxide granulate
US-11492285-B2 · Nov 8, 2022 · US
Optical fiber with reduced attenuation due to reduced absorption contribution
US-2022283363-A1 · Sep 8, 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
Diffuser material of synthetically produced quartz glass and method for the manufacture of a molded body consisting fully or in part thereof
US-11390556-B2 · Jul 19, 2022 · US
Titanium-containing quartz glass having excellent uv absorption, and method for producing same
US-2022204387-A1 · Jun 30, 2022 · US
Slurry-based methods for environmental barrier coating repair and articles formed by the methods
US-2022169551-A1 · Jun 2, 2022 · US
Preparation of carbon-doped silicon dioxide granulate as an intermediate in the preparation of quartz glass
US-11339076-B2 · May 24, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03B2201/07?
- CPC C03B2201/07 is the Cooperative Patent Classification code for “Impurity concentration specified.”
- How many patents are filed under CPC C03B2201/07 (Impurity concentration specified)?
- Our database includes 58 publications tagged with this CPC code.
- Is patent activity under CPC C03B2201/07 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).