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Heraeus Medical Bone Cement Mixing Device with Depressurization US12605196B2

The USPTO granted Patent US12605196B2 to Heraeus Medical GmbH on April 21, 2026, covering a method and device for mixing bone cement with depressurization. The invention uses a cartridge with a drive piston and a central piston permeable to gases and monomer liquid but impermeable to cement powder. The method expels residual gases through drive piston movement, displaces gases between powder particles with inflowing monomer liquid, and depressurizes the cartridge cavity by partially removing monomer liquid. The patent contains 14 claims directed to both the method and the device.