Patent No. EP3299494 (titled "Treated Surface Metal Sheet And Treated Surface Metal Sheet Coated With Organic Resin") was filed by Toyo Seikan Group on May 18, 2016. The application was issued on Oct 13, 2021.

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 |
|---|---|---|
| THE SHERWIN WILLIAMS | Jul 13, 2022 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
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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