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The patent EP3328944 was granted to Imertech on Sep 6, 2023. The application was filed on Jul 29, 2016 under application number EP16745122A. The patent is currently recorded with a legal status of "Revoked".
Precipitated calcium carbonate particles with improved rheological properties in polymeric materials, comprising nanofibers or nanochain-like agglomerates coated with at least one fatty acid or its salt. The particles exhibit exceptionally high yield values in plastisols, making them suitable as additives in a range of materials including paints, sealants, and polymers.

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
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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