Patent No. EP2421761 (titled "Bottle Neck With Internal Embossments And Method Manufacture") was filed by Owens Brockway Glass Container on Sep 17, 2009. The application was issued on Jul 25, 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 |
|---|---|---|
| VETROPACK HOLDING | Feb 16, 2016 | HEPP WENGER RYFFEL |
| WIEGAND GLASHUTTENWERKE | Feb 16, 2016 | HEPP WENGER RYFFEL |
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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