Patent No. EP1567529 (titled "Pseudopolymorphic Forms Of A Hiv Protease Inhibitor") was filed by Janssen R&D Ireland on May 16, 2003. The application was issued on Feb 24, 2021.

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 |
|---|---|---|
| WITTKOPP | Mar 18, 2015 | HAMM&WITTKOPP PATENTANWÄLTE PARTMBB |
| STRAWMAN | Mar 17, 2015 | D YOUNG |
| ALFRED E TIEFENBACHER | Mar 6, 2015 | - |
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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