Silica glass porous body and manufacturing method therefor
US-2025388508-A1 · Dec 25, 2025 · US
Hydroxyl ion (OH)
Hydroxyl ion (OH) · 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 | C03B2201/04 |
| Official title | Hydroxyl ion (OH) |
| Display label | Hydroxyl ion (OH) |
| Total patents | 39 |
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 | 3 |
| 2016 | 4 |
| 2018 | 3 |
| 2019 | 11 |
| 2020 | 6 |
| 2021 | 1 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Manufacturing method of optical fiber preform, optical fiber preform, and optical fiber
US-2025214880-A1 · Jul 3, 2025 · US
Tubular composite body of quartz glass and method for producing and using the same
US-2025051211-A1 · Feb 13, 2025 · US
Optical Fiber Drawing Apparatus and Method Thereof
US-2025002391-A1 · Jan 2, 2025 · US
Glass fiber and method for producing the same
US-12043566-B2 · Jul 23, 2024 · US
High-strength welding process for making heavy glass preforms with large cross sectional areas
US-11739019-B2 · Aug 29, 2023 · US
Preparation of a quartz glass body in a multi-chamber oven
US-11708290-B2 · Jul 25, 2023 · US
Silica glass, high frequency device using silica glass, and silica glass production method
US-2022411322-A1 · Dec 29, 2022 · US
Preparation of quartz glass bodies with dew point monitoring in the melting oven
US-11492282-B2 · Nov 8, 2022 · US
Preparation of a quartz glass body in a melting crucible of refractory metal
US-11299417-B2 · Apr 12, 2022 · US
Preparation of an opaque quartz glass body
US-11236002-B2 · Feb 1, 2022 · US
Glass fiber and method for producing the same
US-2021139368-A1 · May 13, 2021 · US
Preparation of a quartz glass body in a multi-chamber oven
US-2020361806-A1 · Nov 19, 2020 · US
Preparation of a quartz glass body in a multi-chamber oven
US-10730780-B2 · Aug 4, 2020 · US
High-strength welding process for making heavy glass preforms with large cross sectional areas
US-2020231488-A1 · Jul 23, 2020 · US
Glass fibers and pre-forms made of homogeneous quartz glass
US-10676388-B2 · Jun 9, 2020 · US
Preparation of a quartz glass body
US-2020123039-A1 · Apr 23, 2020 · US
Preparation of a synthetic quartz glass grain
US-10618833-B2 · Apr 14, 2020 · US
Low scattering silica glass and method for heat-treating silica glass
US-10370281-B2 · Aug 6, 2019 · US
Preparation of quartz glass bodies from silicon dioxide powder
US-2019152827-A1 · May 23, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03B2201/04?
- CPC C03B2201/04 is the Cooperative Patent Classification code for “Hydroxyl ion (OH).”
- How many patents are filed under CPC C03B2201/04 (Hydroxyl ion (OH))?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC C03B2201/04 growing?
- Publication counts under this code: 1 in 2024 vs 4 in 2025 (latest complete years).