ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,569, issued on April 29, was assigned to DRAGER SAFETY AG & Co. KGAA (Lubeck, Germany).

"Carbon dioxide absorber for a rebreather" was invented by Lorenz Kruger (Lubeck, Germany), Christopher Libicher (Lubeck, Germany) and Tim Weber (Lubeck, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A carbon dioxide absorber (1) and a closed-circuit breathing apparatus (2) with the carbon dioxide absorber are based on the carbon dioxide absorber having an inlet (3) and an outlet (4) gas-tight connectable by a flow duct (5), in which a material (6) is arranged, which absorbs some carbon dioxide contained in the breathing gas stream sent through the materi...