US PATENT SUBCLASS 516 / 161
.~.~.~.~.~ The compound contains nitrogen, except if present solely as NH4+ (e.g., nitroso phenol)

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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.~.~.~.~.~ The compound contains nitrogen, except if present solely as NH4+ (e.g., nitroso phenol) {7}
162  DF  .~.~.~.~.~.~> The nitrogen is a ring member {1}
164  DF  .~.~.~.~.~.~> The compound contains polymer of substituted or unsubstituted phenol and substituted or unsubstituted aldehyde {4}
169  DF  .~.~.~.~.~.~> The compound contains -C(=O)NHH where substitution may be made for the hydrogen {3}
174  DF  .~.~.~.~.~.~> The compound is a salt composed of an organic anion and a nitrogen-containing organic cation (e.g., triethanol amine salt of oleic acid) {1}
176  DF  .~.~.~.~.~.~> The compound contains carboxylic acid ester group {1}
179  DF  .~.~.~.~.~.~> The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)
180  DF  .~.~.~.~.~.~> The compound contains plural nitrogen containing mers* bonded directly to each other (e.g., poly-diallydimethylammonium chloride, polyamine)

DEFINITION

Classification: 516/161

The compound contains nitrogen, except if present solely as NH 4+ (e.g., nitroso phenol):

(under subclass 143) Subject matter in which the organic*

compound contains nitrogen, except for when the nitrogen is present solely as the cationic ammonium group, NH 4+, such as, nitroso phenol.

(1) 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

210, Liquid Purification or Separation,

708, for processes in which an emulsion is treated by a chemical or physical agent to cause the discontinuous phase to coalesce, and cross-reference art collections 922+ for oil spill cleanup (e.g., cross-reference art collection 925 for using chemical agent).