Patent No. EP1624964 (titled "Silver-Containing Catalysts, The Manufacture Of Such Silver-Containing Catalysts, And The Use Thereof") was filed by Shell Internationale Research Maatschappij on May 5, 2004. The application was issued on Jul 31, 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 |
|---|---|---|
| SCIENTIFIC DESIGN | Apr 30, 2020 | HOEFER & PARTNER PATENTANWALTE MBB |
| BASF | Apr 28, 2020 | REITSTOTTER KINZEBACH |
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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