Patent No. EP3490893 (titled "Opening Assembly For Bags Housing Containers For Pharmaceutical Use") was filed by IMA Industria Macchine Automatiche on Jul 26, 2017. The application was issued on Sep 10, 2025.

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 |
|---|---|---|
| BAUSCH STROBEL MASCHINENFABRIK ILSHOFEN | Dec 23, 2021 | WEICKMANN & WEICKMANN PARTMBB |
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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