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Patent No. EP3134933 (titled "Method Of Producing Electrolytic Manganese Dioxide With High Compact Density And Electrolytic Manganese Dioxide Produced Therefrom") was filed by Erachem Comilog on Apr 20, 2015. The application was issued on Oct 21, 2020.

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 |
|---|---|---|
| MARKUS REINHARDT | Jul 19, 2021 | REINHARDT |
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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