US Patent Issued to DORF KETAL CHEMICALS FZE on May 27 for "Composition useful in sulfate scale removal" (Canadian, Norwegian Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,533, issued on May 27, was assigned to DORF KETAL CHEMICALS FZE (Fujairah, United Arab Emirates).

"Composition useful in sulfate scale removal" was invented by Clay Purdy (Medicine Hat, Canada), Markus Weissenberger (Calgary, Canada) and Stig Magnor Nordaa (Sandnes, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a novel aqueous composition for use in removing mixed sulfate scale from a surface contaminated with such, said composition comprising: a chelating agent and a counterion component selected from the group consisting of: Li5DTPA; Na5DTPA; K5DTPA; Cs5DTPA; Na4EDTA; K4EDTA; TEAH4DTPA; and TBAH5DTPA; a diss...