Patent No. EP3538572 (titled "Ethylene Polymers And Ethylene Copolymers For Blown Films") was filed by Chevron Phillips Chemical LP on Nov 6, 2017. The application was issued on Dec 30, 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 |
|---|---|---|
| THE DOW CHEMICAL | Sep 30, 2021 | BECK GREENER |
| TOTALENERGIES ONETECH BELGIUM | Sep 30, 2021 | MELLET |
| BOREALIS | Sep 29, 2021 | 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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