Preparation of 1,1,1,2,3-pentafluoropropane by reduction of 1,2,3-trichloropentafluoropropane Michael Van Der Puy, David Nalewajek US 5315048, 1994, AlliedSignal Inc. Again: Preparation of 1,1,2,3,3-pentafluoropropane Michael Van Der Puy US 5880317, 1999, AlliedSignal Inc.Â