Patent No. EP3676433 (titled "Use Of A Mineral Wool Product") was filed by Rockwool on Aug 29, 2018. The application was issued on Nov 5, 2025.

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 | Aug 5, 2026 | SAINT GOBAIN RECHERCHE |
| KNAUF INSULATION | Jul 28, 2026 | ARC |
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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