Sulfonate Esters (i.e., Compounds Having The Sulfonate Group, -o-s(=o)(=o) , Wherein The Single Bonded Oxygen Is Bonded Directly To Carbon, Which Carbon May Be Single Bonded To Any Atom But May Be Multiple Bonded Only To Carbon) Patents (Class 558/44)
Phosphorus attached directly or indirectly to the sulfonate group by nonionic bonding (Class 558/45)