1. The activation of the phillips polymerization catalyst III. Promotion by titania
2. M.P. McDaniel, P.D. Smith, D.D. Norwood, U.S. Patent 5037911, issued August 6, 1991 to Phillips Petroleum Company.
3. M.P. McDaniel, D.D. Klendworth, M.M. Johnson, U.S. Patent 5171798, issued December 15, 1992, and U.S. Patent 5219962, issued June 15, 1993 and U.S. Patents 5221654 and 5221720, both issued June 22, 1993, and U.S. Patent 5221655, issued June 22, 1993, all to Phillips Petroleum Co.
4. [5] M.P. McDaniel, K.S., Collins, E.A., Benham, P.J. DesLauriers, U.S. Patent 7214642, issued May 8, 2007 to Chevron-Phillips Chemical Company.