Patent No. EP2451435 (titled "Sodium Thiosulfate-Containing Pharmaceutical Compositions") was filed by Hope Medical Enterprises on Jul 7, 2010. The application was issued on Dec 1, 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 |
|---|---|---|
| SHIMAMURA | Jul 31, 2018 | KADOR & PARTNER PART MBB |
| DR FRANZ KOHLER CHEMIE | Jul 30, 2018 | BLUMBACH ZINNGREBE PATENTANWALTE PARTG 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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