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The patent EP2900183 was granted to Aptar Radolfzell on Jun 7, 2017. The application was originally filed on Aug 28, 2013 under application number EP13756866A. The patent is currently recorded with a legal status of "Opposition Rejected".
Liquid dispenser for pharmaceutical fluids with a valve actuator comprising a valve body and a valve pin, wherein the valve body is made of a metallocene-catalyzed plastic and has a section that comes into contact with the liquid in the pressure chamber, and a separate valve spring is used to bias the valve pin towards its closed position.

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.
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