ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,887, issued on May 20, was assigned to KELLOGG BROWN & ROOT LLC (Houston).

"Recovery of light olefins from dry hydrocarbon gas from refinery and petrochemical production processes for production of alkylate" was invented by Gautham Krishnaiah (Houston), Brian Heasley (Cypress, Texas), John Lewis Webb Jr. (Richmond, Texas), Rahul Radhakrishna Pillai (Manvel, Texas), Vijender K. Verma (Richmond, Texas) and Narinder Singh Duggal (Haryana, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and systems for treating an olefin-containing stream are disclosed. The disclosed methods and systems are particularly suitable for treating an off-gas stre...