Patent No. EP3266590 (titled "Blown Film System, Method For Producing A Blown Film Sheet And Film Produced With Same") was filed by Reifenhuser Maschinenfabrik on Aug 7, 2013. The application was issued on Oct 7, 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 |
|---|---|---|
| HOSOKAWA ALPINE | Jul 7, 2021 | CHARRIER RAPP & LIEBAU |
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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