Optical fiber base material manufacturing apparatus
US-2017369358-A1 · Dec 28, 2017 · US
doped with germanium
doped with 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 | C03B2201/31 |
| Official title | doped with germanium |
| Display label | doped with germanium |
| Total patents | 165 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 27 |
| 2016 | 18 |
| 2017 | 22 |
| 2018 | 11 |
| 2019 | 14 |
| 2020 | 12 |
| 2021 | 12 |
| 2022 | 11 |
| 2023 | 17 |
| 2024 | 10 |
| 2025 | 9 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods of manufacturing wide-band multi-mode optical fibers and core preforms for the same
US-2017363806-A1 · Dec 21, 2017 · US
Optical fiber and method of manufacturing the same
US-2017336558-A1 · Nov 23, 2017 · US
Multi-core optical fiber ribbons and methods for making the same
US-9796618-B2 · Oct 24, 2017 · US
Low attenuation fiber with stress relieving layer and a method of making such
US-9778413-B2 · Oct 3, 2017 · US
Optical fibers and preforms with one step fluorine trench and overclad and methods for making the same
US-9776907-B2 · Oct 3, 2017 · US
Optical fiber base material manufacturing apparatus
US-9758422-B2 · Sep 12, 2017 · US
Low attenuation fiber with viscosity matched core and inner clad
US-2017219770-A1 · Aug 3, 2017 · US
Optical fiber with reducing hydrogen sensitivity
US-2017197878-A1 · Jul 13, 2017 · US
Bromine-doped optical fiber
US-2017176673-A1 · Jun 22, 2017 · US
Low attenuation fiber with viscosity matched core and inner clad
US-9658394-B2 · May 23, 2017 · US
Optical fiber with reducing hydrogen sensitivity
US-9650281-B2 · May 16, 2017 · US
Method of assembling optical fiber preforms
US-2017101339-A1 · Apr 13, 2017 · US
Method to prevent cracks in optical fiber preforms
US-2017101335-A1 · Apr 13, 2017 · US
Method of manufacturing multi-mode optical fiber
US-2017057864-A1 · Mar 2, 2017 · US
Quartz glass manufacturing method using hydrogen obtained by vaporizing liquid hydrogen
US-9527764-B2 · Dec 27, 2016 · US
Fiber Bragg Gratings in Carbon-Coated Optical Fibers and Techniques for Making Same
US-2016361779-A1 · Dec 15, 2016 · US
Method of making a multimode optical fiber
US-9481599-B2 · Nov 1, 2016 · US
Low attenuation fiber with stress relieving layer and a method of making such
US-2016299289-A1 · Oct 13, 2016 · US
Multimode optical fibre
US-9459400-B2 · Oct 4, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03B2201/31?
- CPC C03B2201/31 is the Cooperative Patent Classification code for “doped with germanium.”
- How many patents are filed under CPC C03B2201/31 (doped with germanium)?
- Our database includes 165 publications tagged with this CPC code.
- Is patent activity under CPC C03B2201/31 growing?
- Publication counts under this code: 10 in 2024 vs 9 in 2025 (latest complete years).