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
Chemical treatment, e.g. leaching, acid or alkali treatment (dehydroxylation C03C25/64)
Chemical treatment, e.g. leaching, acid or alkali treatment (dehydroxylation C03C25/64) · 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 | C03C25/66 |
| Official title | Chemical treatment, e.g. leaching, acid or alkali treatment (dehydroxylation C03C25/64) |
| Display label | Chemical treatment, e.g. leaching, acid or alkali treatment (dehydroxylation C03C25/64) |
| Total patents | 31 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 2 |
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
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
Laser system using low-chlorine hollow core optical fiber
US-11947160-B2 · Apr 2, 2024 · US
Metal treatments for fiber substrates, processes for treating fiber substrates, and filter media having treated fiber substrates
US-2023212068-A1 · Jul 6, 2023 · US
A method for manufacturing man-made vitreous fibres
US-2023212069-A1 · Jul 6, 2023 · 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
Soundproofing material
US-11535004-B2 · Dec 27, 2022 · 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
Microstructured hollow core optical fiber using low chlorine concentration
US-11402572-B2 · Aug 2, 2022 · US
Antiviral metal treatments for fiber substrates, filter media having antiviral metal treatments, and processes for treating fiber substrates
US-2022117233-A1 · Apr 21, 2022 · US
Antiviral metal treatments for fiber substrates, filter media having antiviral metal treatments, and processes for treating fiber substrates
US-2022061327-A1 · Mar 3, 2022 · US
Method for finely processing nonmetallic mineral
US-2021380490-A1 · Dec 9, 2021 · US
Method for recovering quartz part and apparatus for recovering quartz part
US-2021309569-A1 · Oct 7, 2021 · US
Resin composite and restoration containing bioactive glass fillers
US-10940097-B2 · Mar 9, 2021 · US
Resin composite and restoration containing bioactive glass fillers
US-2020121562-A1 · Apr 23, 2020 · US
Soundproofing material
US-2019329524-A1 · Oct 31, 2019 · US
Method for producing aqueous hydrolysates from aminoalkyltrialkoxysilanes
US-10259832-B2 · Apr 16, 2019 · US
Method for producing aqueous hydrolysates from aminoalkyltrialkoxysilanes
US-2018127442-A1 · May 10, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03C25/66?
- CPC C03C25/66 is the Cooperative Patent Classification code for “Chemical treatment, e.g. leaching, acid or alkali treatment (dehydroxylation C03C25/64).”
- How many patents are filed under CPC C03C25/66 (Chemical treatment, e.g. leaching, acid or alkali treatment (dehydroxylation C03C25/64))?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC C03C25/66 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).