Optical fiber with low chlorine concentration improvements relating to loss and its use, method of its production and use thereof
US-2025208338-A1 · Jun 26, 2025 · 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 | C03B2201/03 |
| Official title | Impurity concentration specified |
| Display label | Impurity concentration specified |
| Total patents | 44 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 6 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 7 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 2 |
| 2024 | 7 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Preform for optical fiber with low chlorine concentration improvements relating to loss and its use, method of its production and use thereof
US-12276829-B2 · Apr 15, 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
Optical fiber with low chlorine concentration improvements relating to loss and its use, method of its production and use thereof
US-2024319436-A1 · Sep 26, 2024 · US
Apparatus and method for manufacturing silica glass crucible
US-12091346-B2 · Sep 17, 2024 · US
Quartz glass crucible, manufacturing method thereof, and manufacturing method of silicon single crystal
US-2024254651-A1 · Aug 1, 2024 · US
Laser system using low-chlorine hollow core optical fiber
US-11947160-B2 · Apr 2, 2024 · US
Method for fabrication of glass preform
US-11912604-B2 · Feb 27, 2024 · US
Silica glass member and method for producing same
US-2024025795-A1 · Jan 25, 2024 · US
Silica glass porous body and manufacturing method therefor
US-2024025802-A1 · Jan 25, 2024 · US
Optical fiber with improvements relating to loss and its use, method of its production and use thereof
US-2023161100-A1 · May 25, 2023 · US
Optical fiber with low chlorine concentration improvements relating to loss and its use, method of its production and use thereof
US-11573366-B2 · Feb 7, 2023 · US
Optical fiber with improvements relating to loss and its use, method of its production and use thereof
US-2022373733-A1 · Nov 24, 2022 · US
Preparation of quartz glass bodies from silicon dioxide granulate
US-11492285-B2 · Nov 8, 2022 · US
Microstructured hollow core optical fiber using low chlorine concentration
US-11402572-B2 · Aug 2, 2022 · US
Preparation of an opaque quartz glass body
US-11236002-B2 · Feb 1, 2022 · US
Apparatus and method for manufacturing silica glass crucible
US-2022009815-A1 · Jan 13, 2022 · US
Optical fiber preform and method for manufacturing such optical fiber preform from a primary preform
US-11046608-B2 · Jun 29, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03B2201/03?
- CPC C03B2201/03 is the Cooperative Patent Classification code for “Impurity concentration specified.”
- How many patents are filed under CPC C03B2201/03 (Impurity concentration specified)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC C03B2201/03 growing?
- Publication counts under this code: 7 in 2024 vs 5 in 2025 (latest complete years).