Patent No. EP3740267 (titled "Packaging Container") was filed by Sanofi on Jan 17, 2019. The application was issued on Feb 28, 2024.
A packaging container, such as a cartridge or pre-filled syringe, comprises a tubular glass housing and a plunger stopper movable therein. To reduce break loose and gliding forces while minimizing drug aggregation and particle formation, at least a section of the plunger stopper's outer surface in contact with the housing's inner surface features a silicone-free coating. Simultaneously, the glass housing includes a silicone coating on at least part of its inner surface, which is bound to the glass via annealing. This configuration is suitable for drug delivery devices, including pen-type injectors, autoinjectors, and pump-driven devices, particularly for medicament formulations that exhibit instabilities or incompatibilities when in contact with unbound silicone.

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 |
|---|---|---|
| HIGHTONE MANAGEMENT | Nov 25, 2024 | GILL JENNINGS & EVERY |
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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