US 6,537,456 B2  Page 3  *  cited by examiner  Practical Ion Exchange, Jan. 1, 1972, Akimitsu Miyahara, et  al; published by Kagaku Kogyo Ltd., (pp. 99-102).  Auerswald, D., "Optimizing the Performance of Reverse  Osmosis/Continuous Electrodeionization System" May/  Jun., 1996.  Aronovitch, H. et al, "Weakly Acidic Cation Performance  Treating Water Containing High Iron" May/Jun. 1995.  Tao, F.T., et al, Conversion of Oilfield Produced Water Into  An Irrigation/Drinking Quality Water, Mar., 1993.  Dyke, F.T., et al, "Removal of Salt, Oil, and Boron From Oil  Field Wastewater By High pH Reverse Osmosis Process› ing", Sep., 1992.  Handbook of Membrane Technology, pp. 26-28, Jul. 15,  1983.  Reverse Osmosis Element Warranty, FilmTce Corporation.  Larson, R.E., "The FT-30 Seawater Reverse Osmosis Mem› brane-Element Test  Results",  FilmTec  Corporation.  Desalination, 38 (1981) 473-483.  Parks, C.S., et al., "Fundamentals of Ion Exchange In Water  Treatment", Presented at the 7th Annual Liberty Bell Cor› rosion Conference, 1969.  Peterson, R.J. et al, "Development of the FT-30 Thin-Film  Composite Membrane for Desalting Applications," Jul.  6-10, 1980.  Filmtec Membranes, Membrane System Design Guidelines  (Dow) Published Mar. 1996.  Petersen, R.J ., et al., "Industrial Applications of the FT-30  Reverse Osmosis Membrane." World Filtration congress III,  1989, pp. 541-547.  Milstead, C.E., et al, "Rejection of Carbon Dioxide and pH  Effects In Reverse Osmosis Desalination." Desalination  (1971), pp. 217-223.  Larson, R.E., et al., "Development of the FT-30 Thin-Film  Composite Membrane," National Water Supply Improve› ment Association 9th Annual Conference and International  Trade Fair, May 31-Jun. 4, 1981.  Lee, Eric, K.L., "Novel Composite Membranes," Apr., 1983.  Nakamura, Tadashi, Seawater Desalination by Reverse  Osmosis Process, Jul./ Aug., 1981.  Crabbe, Daniel C.M., "A Double Pass Reverse Osmosis  System, " Sep., 1976.  Crabbe, Daniel C.M., "A Double Pass Reverse Osmosis  System", Industrial Water Engineering-Dec. 1976/Jan.  1977.  Cadotte, J., "Evolution of Composite Reverse Osmosis  Membranes", 1984.  1982 Report on Technological Development for Boiler  Water by Reverse Osmosis, Exhibit Ko. No. 1., Mar., 1983,  Fresh Water Generation Promotion Center, pp. 1-11, 45-97.  Handbook of Water Purification, Editor Walter Lorch› London, MacGraw-Hill Cop. 1981, XVIII, 715 p. III.  Permasep Products Engineering Manual, E.I., du Pont de  Nemours & Co., 1982.  Applications for High-Purity-Water Production, Edited by  Bipin S. Parekh, 1988.  Development of FT-30 Membranes in Spiral Wound Mod› ules, Oct. 1982.  Handbook of Membrane Technology, pp. 184--198, Jul. 15,  1985.  Annual Research Report No. 42, Shikoku Electric Power  Co., Ltd., Sep. 1983.  Zosui Gijutsu, Water Producing Technology, vol. 10, No. 2,  pp. 13-22, 1984.  FT30 Membrane Description, Technical Bulletin, Dec.,  1992.  Description of the FT-30 Membrane. 