Patent No. EP3632585 (titled "Steel Sheet For Hot Press Formed Member Having Excellent Resistance To Hydrogen Delayed Fracture, And Method For Manufacturing Same") was filed by Posco on May 31, 2018. The application was issued on Apr 24, 2024.

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.
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.