Patent No. EP3850072 (titled "Silver Protection Agent") was filed by Claro Products on Sep 12, 2019. The application was issued on Jan 3, 2024.
A silver protective agent for detergents, particularly dishwashing detergents, that prevents discoloration of silver-containing products during washing. The agent comprises bismuth citrate, a degradable carboxylate or phosphonate, and a salt of methylglycinediacetic acid, which are combined to provide effective protection against silver oxidation and discoloration while being biodegradable and environmentally friendly.

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 |
|---|---|---|
| RECKITT BENCKISER | Oct 3, 2024 | HODGETTS |
| DALLI WERKE | Sep 11, 2024 | F & E PATENT |
| HENKEL | Sep 10, 2024 | - |
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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