Patent No. EP3526229 (titled "Process For Preparing Glucopyranosyl-Substituted Benzyl-Benzene Derivatives") was filed by Boehringer Ingelheim on Oct 9, 2017. The application was issued on Apr 28, 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 |
|---|---|---|
| LEDERER & KELLER | Jan 26, 2022 | LEDERER & KELLER |
| KRAUS & LEDERER PARTGMBB | Jan 26, 2022 | KRAUS & LEDERER PARTGMBB |
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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