US Patent 10561795 Convertible plungers, film coated plungers and related syringe assemblies
Patent 10561795 was granted and assigned to SiO2 Medical Products, Inc. on February, 2020 by the United States Patent and Trademark Office.
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A convertible plunger is provided comprising an internal portion and a generally cylindrical exterior surface. At least a portion of the exterior surface is maintained in an initial expanded state by a property of the internal portion. The expanded state is reducible to a constricted state by an operation that is applied to the internal portion of the plunger to alter the property. A film coating may also be applied to a sidewall of the sleeve to reduce a sliding friction between the sleeve and barrel. A film coating may also be applied to a nose cone of the plunger to provide a barrier between the plunger and product in the barrel.
US Patent 10561795 Convertible plungers, film coated plungers and related syringe assemblies
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