Patent No. EP3967661 (titled "Process For Preparing Battery Grade Metal Sulphate Solutions") was filed by Metal Trade Overseas on Sep 9, 2020. The application was issued on Jul 26, 2023.

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 |
|---|---|---|
| GLENCORE NIKKELVERK | Apr 26, 2024 | ACAPO ONSAGERS |
| GLENCORE NIKKELVERK | Apr 26, 2024 | ONSAGERS |
| UMICORE | Apr 25, 2024 | UMICORE RDI PATENT DEPARTMENT |
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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