Patent No. EP1687019 (titled "Propylene Glycol-Containing Peptide Formulations Which Are Optimal For Production And For Use In Injection Devices") was filed by Novo Nordisk on Nov 18, 2004. The application was issued on Nov 22, 2017.

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 |
|---|---|---|
| UEXKULL & STOLBERG PARTNERSCHAFT VON PATENT UND RECHTSANWALTEN MBB | Aug 22, 2018 | UEXKULL & STOLBERG |
| GENERICS UK | Aug 21, 2018 | TER MEER STEINMEISTER & PARTNER |
| TEVA PHARMACEUTICALS | Aug 21, 2018 | LEDERER & KELLER PATENTANWALTE PARTNERSCHAFT MBB |
| WITTKOPP | Aug 21, 2018 | HAMM & WITTKOPP |
| FRESENIUS KABI DEUTSCHLAND | Aug 20, 2018 | FRESENIUS KABI DEUTSCHLAND |
| SANDOZ | Aug 20, 2018 | 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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