1. K.P. Blackmon, L.P. Barthel-Rosa, S.A. Malbari, D.J. Rauscher, M.M. Daumerie, Production of ultra high melt flow polypropylene resins, US Patent 6 657 025, assigned to Fina Technology, Inc., Houston, TX, Dec. 2, 2003.
2. M. Fujii, S. Kim, Polypropylene materials with high melt flow rate and good molding characteristics and methods of making, US Patent 6 599 985, assigned to Sunoco Inc. (R&M), Philadelphia, PA, Jul. 29, 2003.
3. G. Schmidtthomee, C. Alt, R. Herbeck, H. Moeller, H.G. Trieschmann, Narrowing the molecular weight distribution of polyolefins, GB Patent 1 042 178, assigned to BASF AG, Sep. 14, 1966.
4. J.J. Baron Jr., J.P. Rakus, Thermal degradation of polyolefins in the presence of a metal salt carboxylic acid catalyst, US Patent 3 332 926, assigned to Allied Chem, Jul. 25, 1967.
5. R.L. McConnell, D.A. Weemes, Method for making polyolefin waxes by thermal degradation of higher molecular weight polyolefins in the presence of organic acids and anhydrides, US Patent 3 519 609, assigned to Eastman Kodak Co., Jul. 7, 1970.