US PATENT SUBCLASS 562 / 82
.~.~.~.~ The sulfonate group, oxygen, and alkyl of at least 4 carbons are bonded directly to the same benzene ring

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562 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
30  DF  .~ Sulfonic acids or salts thereof (i.e., compounds containing the sulfonate group, -S(=O)(=O)-O- wherein the single bonded oxygen is bonded directly to hydrogen, or to a group IA or IIA light metal or to substituted or unsubstituted ammonium) {15}
45  DF  .~.~ Benzene ring bonded directly to the sulfonate sulfur (e.g., purification and neutralization of benzene sulfonic acids, etc.) {11}
74  DF  .~.~.~ Nonsulfonate chalcogen attached indirectly to the sulfonate group by nonionic bonding {6}
82.~.~.~.~ The sulfonate group, oxygen, and alkyl of at least 4 carbons are bonded directly to the same benzene ring

DEFINITION

Classification: 562/82

(under subclass 74) Compounds wherein a benzene ring is bonded directly to each of the sulfonate group, oxygen, and alkyl of at least four carbons.

(1) Note. An example of a compound provided for herein is:

[figure]