Patent 7893377 was granted and assigned to Taiyo Nippon Sanso Corporation on February, 2011 by the United States Patent and Trademark Office.
A method of concentrating the stable oxygen isotopes of 17O and 18O by irradiating ozone with light, selectively dissociating an isotopologue of ozone containing an oxygen isotope in its molecule into oxygen, followed by dissociating the ozone and separating the formed oxygen from the non-dissociated ozone.