Patent No. EP3778222 (titled "Decorative Sheet And Decorative Material Using Same") was filed by DAI Nippon Printing on Mar 29, 2019. The application was issued on Jul 31, 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 |
|---|---|---|
| HUECK FOLIEN GESELLSCHAFT | Apr 30, 2025 | BURGER |
| PROFOL | Apr 30, 2025 | HOFFMANN EITLE |
| RENOLIT | Apr 29, 2025 | ZELLENTIN & PARTNER MBB PATENTANWALTE |
| THE CHEMOURS FC | Apr 28, 2025 | MEWBURN ELLIS |
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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