WO9418282-A1  DATABASE ENERGY [Online] US DEPARTMENT OF ENERGY OSTI, OAK RIDGE, TN, US PARRISH, W.R. ET AL: 'Vapor-liquid equilibrium data for the propane/-, n-butane/-, isobutane/-, and propylene/isopropyl fluoride systems at 30 and 50 deg C.', XP002987881 Retrieved from STN Database accession no. 1983(15):130220&J. CHEM. ENG. DATA vol. 27, no. 3, July 1982, pages 303 - 305;  DATABASE ENERGY [Online] US DEPARTMENT OF ENERGY OSTI, OAK RIDGE, TN, US BARBER, J.R. ET AL: 'Vapor-liquid equilibria and azeotropic states of propane-perfluorocyclobutane mixtures - 2.', XP002987882 Retrieved from STN Database accession no. 1982(18):144454&AICHE J. vol. 28, no. 1, January 1982, pages 138 - 142US5458798-A  Azeotropy in refrigerant mixtures, Graham Morrison, Thermophysics Division, National Institute of Standards and Technology and Mark McLinden, date unknown;  Chemical Engineers Handbook, Perry et al., pp. 13-36 "Azeotropic Distillation", 5th ed. 1973, no month available. 4,-18,485, Japan, Jan. 1992;  Copy of European Search Report dated 18/05/1994;  Fluorocarbon Azeotropes KSL-283, Research Disclosure 162 (1977), no month available;  Heat transfer with pool boiling of hydrocarbons and halogenated refrigerants at a plain and a high performance finned tube, Gorenflo et al. 1991, no month available;  J. R. Barber et al., Vapor-Liquid Equilibria And Azeotropic States Of Propane-Perfluorocyclobutane Mixtures, AIChE J. (Jan. 1982), vol. 28(1), pp. 138-142;  W. R. Parrish, Vapor-Liquid Equilibrium Data For The Propane/-, n-Butane/-, Isobutane/-, And Propylene/Isopropyl Fluoride Systems At 30 And 50 Deg. C., J. Chem. Eng. Data (Jul. 1982), vol. 27(3), pp. 303-305US5624596-A  4,-18,485, Japan, Jan. 1992.;  Azeotropy in refrigerant mixture, Graham Morrison, Thermophysics Division, National Institute of Standards and Technology and Mark McLinden., date unknown.;  Chemical Engineers Handbook, Perry et al., p. 36-"Azeotropic Distillation".;  Copy of European Search Report. dated Jun. 1994.;  Fluorocarbon Azeotropes KSL-283, Research Disclosure 162(1977).;  Heat transfer with pool boiling of hydrocarbons and halogenated refrigerants at a plain and a high performance finned tube, Gorenflo et al. 1991.;  J.R. Barber et al., Vapor-Liquid Equilibria And Azeotropic States Of Propane-Perfluorocyclobutane Mixtures, AlChE J. (Jan. 1982), vol. 28(1), pp. 138-142.;  W.R. Parrish, Vapor-Liquid Equilibrium Data For The Propane-, b-Butane-Isobutane-. And PropyleneIsopropyl Fluoride Systems At 30 And 50 Deg. C., J. Chem. Eng. Data (Jul. 1982), vol. 27(3), pp. 303-305.US5635098-A  Azeotropy in refrigerant mixtures, Graham Morrison, Thermophysics Division, National Institute of Standards and Technology and Mark McLinden., (Date Unknown).;  Chemical Engineers Handbook, Perry et al., pp. 13-36-"Azeotropic Distillation", 5th Ed. 1973 No Month Available.;  Fluorocarbon Azeotropes KSl-283, Research Disclosure 162 (1977).;  Heat transfer with pool boiling of hydrocarbons and halogenated refrigerants at a plain and a high performance finned tube, Gorenflo et al. 1991, Waerme-Stoffuebertrag 26(5), 273-81 (Abstract Only).;  J.R. Barber et al., Vapor-LIquid Equilibria And Azeotropic States Of Propane-Perfluorocyclobutane Mixtures, AIChE J. (Jan. 1982), vol. 28(1), pp. 138-142. (Abstract Only).;  W.R. Parrish, Vapor-Limited Equilibrium Data For The Propane/-, n-Butane/-, Isobutane/-, And Propylene/Isopropyl Fluoride Systems At 30 And 50 Deg. C., J. Chem. Eng. Data (Jul. 1982), vol. 27(3), pp. 303-305. (Abstract Only).US5670079-A  4,-18,485, Japan, Jan. 1992.;  Azeotropy in refrigerant mixtures, Graham Morrison, Thermophysics Division, National Institute of Standards and Technology and Mark McLinden., (date unknown).;  Chemical Engineers Handbook, Perry et al., pp. 13-36-"Azeotropic Distillation", 5th ed. 1973 no month available.;  Dahmen et al, Fluid Phase Equilibria vol. 87 pp. 295-308, Aug. 1993.;  Dewitte et al, Sci Tech Froid pp. 109-116, 1992 month not known.;  Fluorocarbon Azeotropes KSL-283, Research Disclosure 162 (1977).;  Heat transfer with pool boiling of hydrocarbons and halogenated refrigerants at a plain and a high performance finned tube, Gorenflo et al. 1991, Waerme-Stoffuebertrag, 26 (5), 273-81 (Abstract Only).;  J.R. Barber et al., Vapor-Liquid Equilibria And Azeotropic States Of Propane-Perfluorocyclobutane Mixtures, AIChEJ. (Jan. 1982), vol. 28(1), p. 138-142 (Abstract Only).;  W.R. Parrish, Vapor-Liquid Equilibrium Data For The Propane/-, n-Butane/-, Isobutane/-, And Propylene/Isopropyl Fluoride Systems At 30 And 50 Deg. C., J. Chem. Eng. data (Jul. 1982), vol. 27(3), pp. 303-305. (Abstract Only).;  Wirths, Michael, et al., "High Pressure Phase Studies on Fluid Binary Mixtures", Fluid Phase Equilib., 21(3), 257-78 (1985) month unknown.EP682683-B1  DATABASE ENERGY US DEPARTMENT OF ENERGY OSTI, OAK RIDGE, TN, US BARBER, J.R. ET AL 'Vapor-liquid equilibria and azeotropic states of propane-perfluorocyclobutane mixtures - 2.' & AICHE J. (JAN 1982) V. 28(1) P. 138-142 CODEN: AICEAC ISSN: 0001-1541;  DATABASE ENERGY US DEPARTMENT OF ENERGY OSTI, OAK RIDGE, TN, US PARRISH, W.R. ET AL 'Vapor-liquid equilibrium data for the propane/-, n-butane/-, isobutane/-, and propylene/isopropyl fluoride systems at 30 and 50 deg C.' & J. CHEM. ENG. DATA (JUL 1982) V. 27(3) P. 303-305 CODEN: JCEAAX ISSN: 0021-9968