Dusa Pharma (Dusa)

[surf1944]

6:34AM DUSA Pharma reports U.S. patent office upholds key photodynamic therapy patent (DUSA) 2.16 : Co announces that the United States Patent and Trademark Office has completed its re-examination of US Patent No. 5,079,262, "Method of detection and treatment of malignant and non-malignant lesions utilizing 5-aminolevulinic acid." In its latest communication, the USPTO issued a Notice of Intent to Issue Ex Parte Re-examination Certificate which affirms the patent's original seven claims and adds eight claims. This patent covers the use of aminolevulinic acid, the active ingredient in DUSA's Levulan Kerastick, for the treatment of actinic keratoses with light.