Dusa Targets Chemical Supplier, Physicians In Suits

Law360 (July 11, 2006, 12:00 AM EDT) -- In an aggressive attack to assert its patents related to aminolevulinic acid, Dusa Pharmaceuticals Inc. has shot off a spate of lawsuits against an Arizona chemical supplier and six physicians in multiple states for infringing its patents and, in some cases, engaging in unfair competition and infringing its trademark.

Dusa filed the lawsuits Monday in Arizona, California, Florida and Ohio federal courts, asserting its exclusive license for Levulan, or aminolevulinic acid (ALA), used to treat keratosis, acne and other dermatological conditions.

"It is unfortunate that we...
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