Patent No. EP3658494 (titled "Method For The Preparation Of Synthesis Gas") was filed by Haldor Topse on Jul 20, 2018. The application was issued on Jan 19, 2022.

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 |
|---|---|---|
| CASALE | Oct 19, 2022 | M ZARDI |
| JOHNSON MATTHEY PUBLIC | Oct 19, 2022 | BOWN |
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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