Patent No. EP2456942 (titled "Spacer Bar For A Multiple Panel Glazing Unit And Method Of Making A Spacer Bar And A Multiple Panel Glazing Unit") was filed by Beresford on Apr 14, 2010. The application was issued on Oct 30, 2019.

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 |
|---|---|---|
| SAINT GOBAIN | Mar 22, 2017 | SAINT GOBAIN RECHERCHE |
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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