Patent No. EP2665680 (titled "Method For Obtaining Elements Or Element Compounds From The Intermediate Products Or By-Products Obtained During The Production Of Titanium Dioxide") was filed by Huntsman P&A Uerdingen on Jan 17, 2012. The application was issued on Oct 18, 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.
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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