ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,287, issued on Nov. 18, was assigned to EcoCrystal Ltd. (Rehovot, Israel).
"Synthetic co-crystals of anhydrous guanine and process for preparing the same" was invented by Dvir Gur (Rehovot, Israel), Lia Addadi (Rehovot, Israel) and Stephen Weiner (Rehovot, Israel).
According to the abstract* released by the U.S. Patent & Trademark Office: "This invention is directed to synthetic co-crystals of anhydrous guanine and at least one additional material, wherein the co-crystals have a high refraction index and therefore, provide products with pearlescence or whiteness with high coverage. The invention is further directed to a process for the preparation of anhydrous guanine and of the ...