Patent No. EP3573823 (titled "Sheet-Like Composite For Producing Dimensionally Stable Food Product Containers With A Barrier Layer Comprising A Barrier Substrate Layer And An Inwards-Pointing Barrier Material Layer") was filed by SIG Combibloc Services on Jan 12, 2018. The application was issued on Jun 22, 2022.

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 |
|---|---|---|
| TETRA LAVAL & FINANCE | Mar 22, 2023 | BECK GREENER |
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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