US PATENT SUBCLASS 516 / 162
.~.~.~.~.~.~ The nitrogen is a ring member

Current as of: June, 1999
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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}
161  DF  .~.~.~.~.~ The compound contains nitrogen, except if present solely as NH4+ (e.g., nitroso phenol) {7}
162.~.~.~.~.~.~ The nitrogen is a ring member {1}
163  DF  .~.~.~.~.~.~.~> The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)

DEFINITION

Classification: 516/162

The nitrogen is a ring member:

(under subclass 161) Subject matter in which the nitrogen in the organic* compound is a member of a ring structure.

(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 and its indent subclass.

(2) Note. Materials* used as agents* which are impurely or crudely derived from plant or animal sources, are assumed to contain nitrogen-containing organic* compounds (i.e., the DNA and proteins), unless clearly separated out, such as cellulose, carbohydrate fractions, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

SEE OR SEARCH CLASS

435, Chemistry: Molecular Biology and Microbiology,262+, for processses in which preexisting material or compound, which may include a hazardous or toxic waste, present in a composition or material containing a preexisting material, is contacted with an enzyme or immobilized enzyme micro-organism or plant or animal cells to isolate or recover the preexisting material which is chemically unchanged by the process and the hazardous or toxic waste is destroyed (especially subclass 262.5 for processes wherein hazardous or toxic waste such as oil spill is destroyed or converted into an environmentally safe substance, subclass 266 for processes of using enzyme or microorganism to liberate, separate, or purifty by treating gas, emulsion, or foam, subclasses 281+ for processes of recovering petroleum or shale oil), foreign art collection FOR184 for method of using genetically engineered cells other than hybrid or fused cells for oil spill cleanup.