Patent No. EP3044249 (titled "Polyarylene Ether Sulfone-Polymers For Membrane Applications") was filed by Basf on Sep 4, 2014. The application was issued on Sep 13, 2023.

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 |
|---|---|---|
| SOLVAY SPECIALTY POLYMERS USA | Mar 21, 2018 | BENVENUTI |
| FRESENIUS MEDICAL CARE DEUTSCHLAND | Mar 20, 2018 | RICKER |
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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