US PATENT SUBCLASS 562 / 88
.~.~.~ Plural benzene rings bonded directly to each other, or to the same acyclic carbon or acyclic carbon chain

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}
88.~.~.~ Plural benzene rings bonded directly to each other, or to the same acyclic carbon or acyclic carbon chain

DEFINITION

Classification: 562/88

(under subclass 45) Compounds wherein an acyclic carbon or an acyclic carbon chain is bonded directly to plural benzene rings, or two benzene rings are bonded directly to each other.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]