US PATENT SUBCLASS 562 / 74
.~.~.~ Nonsulfonate chalcogen attached indirectly to the sulfonate group by nonionic bonding

Current as of: June, 1999
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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.~.~.~ Nonsulfonate chalcogen attached indirectly to the sulfonate group by nonionic bonding {6}
75  DF  .~.~.~.~> Two benzene rings bonded to the nonsulfonate chalcogen (e.g., phenoxyphenyl compounds, etc.)
76  DF  .~.~.~.~> Plural carbons bonded directly to the nonsulfonate chalcogen (e.g., ethers, sulfones, etc.) {1}
78  DF  .~.~.~.~> Halogen attached indirectly to the sulfonate group by nonionic bonding
79  DF  .~.~.~.~> The sulfonate group and oxygen are bonded directly to the same polycyclo ring system which consists of benzene rings {1}
81  DF  .~.~.~.~> Plural oxygens bonded directly to the same benzene ring
82  DF  .~.~.~.~> The sulfonate group, oxygen, and alkyl of at least 4 carbons are bonded directly to the same benzene ring

DEFINITION

Classification: 562/74

(under subclass 45) Compounds wherein the sulfonate group is attached indirectly by nonionic bonding to a chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) that is not part of a sulfonate group.

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

(2) Note. Compounds within the scope of this subclass and its indents may contain plural sulfonate groups, provided the required nonsulfonate chalcogen is present.