Patent No. EP3494972 (titled "Combinations Of Dolutegravir And Lamivudine For The Treaetment Of Hiv Infection") was filed by Viiv Healthcare on Jan 24, 2011. The application was issued on Dec 13, 2023.

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 |
|---|---|---|
| ELKINGTON AND FIFE | Sep 13, 2024 | ELKINGTON AND FIFE |
| ZENTIVA KS | Sep 13, 2024 | REDDIE & GROSE |
| KILBURN & STRODE | Sep 12, 2024 | KILBURN & STRODE |
| SANDOZ | Sep 12, 2024 | TER MEER STEINMEISTER & PARTNER |
| TEVA PHARMACEUTICALS | Sep 12, 2024 | D YOUNG |
| BETAPHARM ARZNEIMITTEL | Sep 11, 2024 | HAMM & WITTKOPP |
| HAMM & WITTKOPP | Sep 11, 2024 | HAMM & WITTKOPP |
| NEDERLANDSCH OCTROOIBUREAU | Sep 11, 2024 | NEDERLANDSCH OCTROOIBUREAU |
| STADA ARZNEIMITTEL | Sep 11, 2024 | HAMM & WITTKOPP |
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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Aug 24, 2011