Patent No. EP3296348 (titled "Polypropylene Film, Metal Membrane Layered Film, And Film Capacitor, And Method For Manufacturing Same") was filed by Toray Industries on May 11, 2016. The application was issued on Oct 26, 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 |
|---|---|---|
| TREOFAN GERMANY | Jul 26, 2023 | MAI BESIER |
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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