Patent No. EP1848422 (titled "Method For Decreasing Cartilage Damage In Dogs") was filed by Hills PET Nutrition on Feb 13, 2006. The application was issued on Oct 24, 2018.

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 |
|---|---|---|
| IAMS EUROPE | Jul 19, 2019 | SCHIWECK WEINZIERL KOCH PATENTANWALTE PARTNERSCHAFT MBB |
| MARS | Jul 11, 2019 | CABINET NONY |
| MARS | Jul 11, 2019 | IPSILON |
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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