ALEXANDRIA, Va., March 24 -- United States Patent no. 12,583,756, issued on March 24, was assigned to Carbon Engineering ULC (Squamish, Canada).

"Recovering a caustic solution via calcium carbonate crystal aggregates" was invented by Kenton Robert Heidel (Calgary, Canada), David William Keith (Canmore, Canada), Jane Anne Ritchie (Calgary, Canada), Nicholas Vollendorf (New Berlin, Wis.) and Eric Fessler (Brookfield, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques for growing crystalline calcium carbonate solids such that the crystalline calcium carbonate solids include a volume of 0.0005 mm3 to 5 mm3, include a slaker to react quicklime (CaO) and a low carbonate content fluid to yield a slurry ...