Patent No. EP2277694 (titled "Photovoltaic Modules Using An Adhesive Integrated Heat Resistant Multi-Layer Backsheet") was filed by Renolit Belgium on Jul 21, 2010. The application was issued on Jan 12, 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 |
|---|---|---|
| DSM ASSETS | Jun 11, 2018 | DSM FIRMENICH |
| BOREALIS | Jun 8, 2018 | MAIWALD |
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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