US Patent Issued to PETROLEO BRASILEIRO S.A.-PETROBRAS on April 7 for "Chemical product comprising an anionic surfactant, chelant, and enzyme, and process for cleaning nanofiltration and reverse osmosis membranes" (Brazilian Inventor)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,436, issued on April 7, was assigned to PETROLEO BRASILEIRO S.A.-PETROBRAS (Rio de Janeiro, Brazil).

"Chemical product comprising an anionic surfactant, chelant, and enzyme, and process for cleaning nanofiltration and reverse osmosis membranes" was invented by Joselito Barbosa Maciel (Rio de Janeiro, Brazil).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a chemical product and process for cleaning nanofiltration and reverse osmosis membranes, based on enzymatic action aiming to remove biofouling and inorganic scale quickly. The product mentioned in present invention also proposes elimination of the neutralization step...