US Patent Issued to Gradiant on Sept. 8 for "Membranes with controlled porosity for serial filtration" (Massachusetts Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,389, issued on Sept. 8, was assigned to Gradiant Corp. (Woburn, Mass.).

"Membranes with controlled porosity for serial filtration" was invented by Omkar Lokare (Somerville, Mass.) and Richard Stover (Waltham, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A serial filtration system for liquid purification includes a preliminary-stage reverse-osmosis (RO) module and a first-stage, high-permeability, reverse-osmosis (HiRO) module. Both modules include (a) a chamber including an inlet, a retentate outlet, and a permeate outlet, and (b) at least one membrane separating the chamber into a retentate side on an upstream side of the membrane and a per...