ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,114, issued on May 20, was assigned to LAMBERTI SPA (Albizzate, Italy).
"Solvent-based asphaltite suspensions" was invented by Alberto Zeffiro (Sugar Land, Texas), Andrea Balestrini (Sugar Land, Texas) and Sama Nazar Makiah (Richmond, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "Solvent-based suspensions of asphaltite comprising a carrier fluid, an asphaltite powder and a suspending agent, wherein said suspending agent is a copolymer of a monoethylenically unsaturated monomer containing a carboxylic group and of a C1-C8 (meth)acrylic acid alkyl ester; subterranean treatment fluid containing the solvent-based suspensions of asphaltite and met...