Patent No. EP2391448 (titled "Catalyst With Bimodal Pore Size Distribution And The Use Thereof") was filed by Scientific Design on Jan 5, 2010. The application was issued on Nov 21, 2018.

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 |
|---|---|---|
| SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ | Aug 21, 2019 | SHELL LEGAL SERVICES |
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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