Silica glass porous body and manufacturing method therefor
US-2025388508-A1 · Dec 25, 2025 · US
chlorine containing
chlorine containing · 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 | C03C2203/44 |
| Official title | chlorine containing |
| Display label | chlorine containing |
| Total patents | 33 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 6 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 4 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Silica glass substrate
US-2024407089-A1 · Dec 5, 2024 · US
Silica glass for radio-frequency device and radio-frequency device technical field
US-11912617-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
Photodarkening-resistant ytterbium-doped quartz optical fiber and preparation method therefor
US-11780768-B2 · Oct 10, 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
Halogen co-doped optical fibers
US-11175450-B2 · Nov 16, 2021 · US
Photodarkening-resistant ytterbium-doped quartz optical fiber and preparation method therefor
US-2021230051-A1 · Jul 29, 2021 · US
Preparation of a quartz glass body in a multi-chamber oven
US-2020361806-A1 · Nov 19, 2020 · US
Silica glass for radio-frequency device and radio-frequency device technical field
US-2020255324-A1 · Aug 13, 2020 · US
Preparation of a quartz glass body in a multi-chamber oven
US-10730780-B2 · Aug 4, 2020 · US
Halogen co-doped optical fibers
US-2020049881-A1 · Feb 13, 2020 · US
Device for manufacturing SiO2-TiO2 based glass
US-10266443-B2 · Apr 23, 2019 · US
Preparation of a quartz glass body in a hanging metal sheet crucible
US-2019077688-A1 · Mar 14, 2019 · US
Reducing carbon content of silicon dioxide granulate and the preparation of a quartz glass body
US-2019077672-A1 · Mar 14, 2019 · US
Preparation of a quartz glass body in a multi-chamber oven
US-2019062193-A1 · Feb 28, 2019 · US
Steam treatment of silicon dioxide powder in the preparation of quartz glass
US-2019062194-A1 · Feb 28, 2019 · US
Low loss optical fiber and method of making the same
US-10197728-B2 · Feb 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03C2203/44?
- CPC C03C2203/44 is the Cooperative Patent Classification code for “chlorine containing.”
- How many patents are filed under CPC C03C2203/44 (chlorine containing)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC C03C2203/44 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).