1. a Heat Transfer Research, Inc. , College Station , Texas , USA
2. b ConocoPhillips Co. , Ponca City , Oklahoma , USA
3. c Cal Gavin Limited , Alcester , Warwickshire , UK
4. d ChevronTexaco Energy Technology Co. , Richmond , California , USA
5. e ExxonMobil Research and Engineering Co. , Annandale , New Jersey , USA
6. f BP p.l.c., Sunbury-on-Thames , Middlesex , UK
7. g Chevron Products Co. , El Segundo , California , USA
8. h ExxonMobil Research and Engineering Co. , Fairfax , Virginia , USA
9. i Shell Global Solutions International BV , Amsterdam , The Netherlands