Patent No. EP3324936 (titled "Method For Producing A Bortezomib Ester Solution") was filed by Stada Arzneimittel on Jul 21, 2016. The application was issued on Sep 28, 2022.

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 |
|---|---|---|
| ACCORD HEALTHCARE | Jun 28, 2023 | TER MEER STEINMEISTER & PARTNER |
| EXTROVIS | Jun 27, 2023 | BREUER |
| NEDERLANDSCH OCTROOIBUREAU | Jun 27, 2023 | NEDERLANDSCH OCTROOIBUREAU |
| STRAWMAN | Jun 26, 2023 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
| GRUND | Jun 16, 2023 | GRUND |
| CONSILIENT HEALTH | Apr 24, 2023 | ELKINGTON AND FIFE |
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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