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Patent No. EP2649130 (titled "Liner For Gas Storage Tank") was filed by DSM Assets on Dec 9, 2011. The application was issued on Aug 23, 2017.

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 |
|---|---|---|
| LANXESS DEUTSCHLAND | May 22, 2018 | - |
| RPE | May 22, 2018 | HARTZ |
| TORAY INDUSTRIES | May 22, 2018 | MEWBURN ELLIS |
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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