Inventor

HELMKE JR HAROLD W

US2 patents

Patents

2 patents

US7439412B2Oct 21, 2008

Process for producing para-xylene

EXXONMOBIL CHEM PATENTS INC21 citations90

US7626065B2Dec 1, 2009

Process for producing para-xylene

EXXONMOBIL CHEM PATENTS INC14 citations82