ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,735,443, issued on Sept. 15, was assigned to Chr. Hansen A/S (Hoersholm, Denmark).

"Purification of oligosaccharides from a fermentation broth by using filtration" was invented by Stefan Jennewein (Bad Honnef, Germany), Jan Henrik Krahn (Sankt Augustin, Germany) and Markus Helfrich (Bad Hoenningen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is method for the purification of an oligosaccharide of interest from a fermentation broth, the method comprises providing a cell-free fermentation broth to a first filtration step using a nanofiltration membrane, thereby providing a filtrate which contains the oligosaccharide of interest; subj...