Patent 11905269 was granted and assigned to Pall Corporation on February, 2024 by the United States Patent and Trademark Office.
The invention provides a material comprising (i) a crown ether of formula (I), (ii) a crown ether of formula (II), and/or (iii) a crown ether of formula (III), or a salt thereof, wherein each m independently is an integer from 1 to 8, p is an integer from 1 to 1000, each “