Patent No. EP3052574 (titled "Refill For Writing, Drawing And/Or Painting Devices And Method For The Production Thereof") was filed by Staedtler Mars on Sep 11, 2014. The application was issued on Jun 14, 2017.

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 |
|---|---|---|
| SOCIETE BIC | Mar 13, 2018 | CABINET BEAU DE LOMENIE |
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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