Patent No. EP4263456 (titled "Material Comprising A Stack With A Thin Zinc-Based Dielectric Oxide Underlayer And Method For Depositing Said Material") was filed by Saint Gobain on Dec 16, 2021. The application was issued on Oct 30, 2024.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| AGC GLASS EUROPE | Jul 25, 2025 | AGC GLASS EUROPE |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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