1. US 9.139.500 (2015 Dow); US 9.040.759 and 8.530.708 (2013 Honeywell); US 6.392.077 (2002 IST); EP 0.850.676 (1998 Nippon Shokubai); WO 98/33.755 and 98/33.756 (1998 DuPont); US 5.892.135 (1999 DuPont); US 5.453.557 (1995 Dow); Ertl/Knözinger/Schüth/Weitkamp Vol. 5 p.2387;