US PATENT SUBCLASS 516 / 149
.~.~.~.~.~.~.~ The nitrogen is a ring member (e.g., imidazoline salt of an organosulfonic acid)

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516 /   HD   COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF

113  DF  COMPOSITIONS CONTAINING AN AGENT FOR BREAKING (RESOLVING) OR INHIBITING COLLOID SYSTEMS; PROCESSES OF BREAKING (RESOLVING) OR INHIBITING COLLOID SYSTEMS (E.G., GEL BREAKING OR INHIBITING, COAGULATING, FLOCCULATING); PROCESSES OF PREPARING THE COMPOSITIONS {3}
135  DF  .~ Continuous liquid phase colloid system and discontinuous liquid phase (e.g., breaking an emulsion) {4}
139  DF  .~.~ The agent contains material which is different from the primary components of both liquid phases of the emulsion colloid system (i.e., more than only diluting) {2}
141  DF  .~.~.~ Aqueous-petroleum, petroleum-aqueous, aqueous-hydrocarbon, or hydrocarbon-aqueous emulsion systems {2}
143  DF  .~.~.~.~ The agent contains organic compound {5}
146  DF  .~.~.~.~.~ The compound contains sulfoxy* (e.g., sulfonate terpene) {7}
148  DF  .~.~.~.~.~.~ The compound contains nitrogen, except if present solely as NH4+ {3}
149.~.~.~.~.~.~.~ The nitrogen is a ring member (e.g., imidazoline salt of an organosulfonic acid)

DEFINITION

Classification: 516/149

Nitrogen is a ring member (e.g., imidazoline salt of an organosulfonic acid):

(under subclass 148) Subject matter in which the nitrogen of the organic* sulfoxy* containing compound is a member of a ring structure, such as, imidazoline salt of an organosulfonic acid.

(1)

Note: In order to be considered a ring, nonionic bonding must exist between all ring members. Inner salt compounds such as betaines, sulfobetaines, etc., wherein two ring members are attached to each other by ionic bonding, are not regarded as rings for purposes of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

126+, for similar subject matter related to breaking (resolving) or inhibiting of foams.