Patent No. EP3806190 (titled "Resin Composition For Nonaqueous Electrolyte Secondary Battery, Separator For Nonaqueous Electrolyte Secondary Battery Using Same, Resin Composition For Electrode Mixture Layer, Electrode For Nonaqueous Electrolyte Secondary Battery, And Nonaqueous Electrolyte Secondary Battery") was filed by Kureha on Feb 21, 2019. The application was issued on Aug 24, 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 |
|---|---|---|
| ARKEMA FRANCE | May 22, 2023 | BANDPAY & GREUTER |
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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