NEW CASTLE, Del.--(BUSINESS WIRE)--On August 31, 2006, Roquette Freres filed a lawsuit against SPI Pharma, Inc. in federal district court in Delaware alleging that SPI Pharma’s Mannogem™ EZ Spray Dried Mannitol product infringes Roquette’s U.S. Patent No. 5,573,777 (“ ‘777 patent”). Mannogem™ EZ Spray Dried Mannitol is designed to assist the pharmaceutical formulator in tableting difficult-to-use, fine active ingredients.