Patent No. EP3366467 (titled "Rf Interference Reduction For Functional Glazings") was filed by Pilkington Automotive Deutschland on Jul 3, 2008. The application was issued on Sep 6, 2023.
Automotive glazings incorporating switchable films with integrated low-emissivity coatings for improved thermal performance. The glazings comprise a laminated construction with a switchable film sandwiched between two glass plies and interlayer materials, and feature low-emissivity coatings on the glass surfaces to reduce heat transfer. The coatings comprise a multilayer stack of metal and dielectric layers, typically sputtered onto the glass surfaces. The glazings provide both switchable light control and thermal insulation, suitable for applications such as rooflights, sidelights, and privacy glass.

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 |
|---|---|---|
| SAINT GOBAIN | May 29, 2024 | GEBAUER |
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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