Patent No. EP2585297 (titled "A Sheet, A Method Of Making And Using A Sheet As A Lid For Packages") was filed by Danapak Flexibles on Jun 16, 2011. The application was issued on Jun 13, 2018.

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 |
|---|---|---|
| CONSTANTIA TEICH | Mar 13, 2019 | PATENTANWALTE BARGER |
| AMCOR FLEXIBLES SELESTAT | Jul 20, 2018 | DIEHL & PARTNER |
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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