Patent No. EP3390049 (titled "Polyethylene Based Laminated Film Structure With Barrier Properties") was filed by Borealis on Dec 13, 2016. The application was issued on Aug 19, 2020.

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 |
|---|---|---|
| TREOFAN GERMANY | May 19, 2021 | MAI BESIER |
| THE DOW CHEMICAL | May 18, 2021 | BOULT WADE TENNANT |
| SABIC SABIC PETROCHEMICALS | May 17, 2021 | SABIC GROUP |
| SABIC SABIC PETROCHEMICALS | May 17, 2021 | SABIC INTELLECTUAL GROUP |
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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