Porous glass base material manufacturing apparatus, method for manufacturing porous glass base material, and method for manufacturing glass base material for optical fiber
US-2025388505-A1 · Dec 25, 2025 · US
Silica-free oxide glass compositions
Silica-free oxide glass compositions · 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 | C03C13/048 |
| Official title | {Silica-free oxide glass compositions} |
| Display label | Silica-free oxide glass compositions |
| Total patents | 32 |
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 | 1 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Porous glass base material manufacturing apparatus, method for manufacturing porous glass base material, and method for manufacturing glass base material for optical fiber
US-12371364-B2 · Jul 29, 2025 · US
Glass, optical filter, and optical device
US-2025122115-A1 · Apr 17, 2025 · US
Organic-inorganic composites and methods of manufacturing thereof
US-11993028-B2 · May 28, 2024 · US
Optical fiber raw material composition, optical fiber, and optical fiber product
US-2023275388-A1 · Aug 31, 2023 · US
Transmitting and detecting light with optical fiber during sintering
US-11668528-B2 · Jun 6, 2023 · US
Porous glass base material manufacturing apparatus, method for manufacturing porous glass base material, and method for manufacturing glass base material for optical fiber
US-2023167004-A1 · Jun 1, 2023 · US
Method for preparing all-solid-state photonic crystal fiber preforms by extrusion
US-11530156-B2 · Dec 20, 2022 · US
Fiber optics plate, scintillator panel, radiation detector, electron microscope, x-ray blocking method and electron beam blocking method
US-2022340480-A1 · Oct 27, 2022 · US
Optical fiber
US-11366267-B2 · Jun 21, 2022 · US
High refractive index optical borate glass
US-11319243-B2 · May 3, 2022 · US
Optical boroaluminate glasses
US-11247934-B2 · Feb 15, 2022 · US
Organic-inorganic composites and methods of manufacturing thereof
US-2022016854-A1 · Jan 20, 2022 · US
Transmitting and detecting light with optical fiber during sintering
US-2021325113-A1 · Oct 21, 2021 · US
Inorganic biodegradable substrates for devices and systems
US-11013836-B2 · May 25, 2021 · US
Optical fiber
US-2021132291-A1 · May 6, 2021 · US
Fluorophosphate glasses for active device
US-10988406-B2 · Apr 27, 2021 · US
Fluorophosphate glasses for active device
US-10941072-B2 · Mar 9, 2021 · US
Organic-inorganic composite fibers and methods thereof
US-10875806-B2 · Dec 29, 2020 · US
Method for Preparing All-Solid-State Photonic Crystal Fiber Preforms by Extrusion
US-2020354260-A1 · Nov 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03C13/048?
- CPC C03C13/048 is the Cooperative Patent Classification code for “Silica-free oxide glass compositions.”
- How many patents are filed under CPC C03C13/048 (Silica-free oxide glass compositions)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC C03C13/048 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).