Sulfate Esters ( I.e., Compounds Having The Sulfate Group, -o-s(=o)(=o)o-, Bonded Directly To At Least One Carbon, Which Carbon May Be Single Bonded To Any Atom But May Be Multiple Bonded Only To Carbon) Patents (Class 558/20)
Benzene ring attached directly or indirectly to the sulfate group by nonionic bonding (Class 558/37)