ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,147, issued on May 27, was assigned to Becton Dickinson and Co. (Franklin Lakes, N.J.).
"Dual chamber syringe assembly" was invented by Kevin M. Ryan (Whitehouse Station, N.J.) and Angela Huenerfauth (Morristown, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A syringe having two variable volumes are described herein. The syringe includes a first stopper and a second stopper, the first stopper being connected to a plunger. A first variable volume of the two variable volumes is disposed between the first stopper and the second stopper and a second variable volume of the two variable volumes is between the second stopper and a distal end of a bar...