Patent No. EP3645272 (titled "Multilayer Polyethylene Laminates And Films For Use In Flexible Packaging Materials") was filed by DOW on Jun 28, 2018. The application was issued on May 19, 2021.

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 |
|---|---|---|
| BOREALIS | Feb 15, 2022 | KADOR & PARTNER PART MBB |
| BOREALIS | Feb 15, 2022 | KADOR & PARTNER PART MBB |
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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