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Patent No. EP2550972 (titled "Klotho-Beta For Use In Treating Cancer, Liver Disorders, Gallstones, Wasting Syndrome And Obesity-Related Diseases") was filed by Genentech on Apr 1, 2008. The application was issued on Feb 21, 2018.

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 |
|---|---|---|
| MATHYS & SQUIRE | Nov 21, 2018 | WILDING |
| NGM BIOPHARMACEUTICALS | Nov 20, 2018 | JONES DAY |
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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