75287107
May 6, 1997
Dec 9, 2003
Active Trademark
catalyst for use in the treating of heavy hydrocarbon feedstocks with steam to upgrade the feedstock into more valuable lower boiling point hydrocarbon products
Chemicals(Based on 44(e)) -- technical modification of visbreaking equipment for use in the treatment of heavy hydrocarbon feedstocks in the presence of a catalyst and steam to upgrade the feedstock into more valuable lower boiling point hydrocarbon products
Building Construction and Repair