ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,664, issued on Dec. 23, was assigned to ENTEGRIS INC. (Billerica, Mass.).
"Membranes for acid-sensitive solvents" was invented by James Hamzik (N Billerica, Mass.) and Jad Ali Jaber (Westford, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure provides certain strong cation-modified ion exchange resins and membranes useful for carrying out the removal of metal and metal ion contaminants in fluid compositions. Filtered liquid compositions with significantly reduced amounts of metals can be used in a microelectronic manufacturing process, such as liquids for removing photoresist. The cation-modified ion exchange resins and membranes ...