US PATENT SUBCLASS 516 / 169
.~.~.~.~.~.~ The compound contains -C(=O)NHH where substitution may be made for the hydrogen


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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}
169.~.~.~.~.~.~ The compound contains -C(=O)NHH where substitution may be made for the hydrogen {3}
170  DF  .~.~.~.~.~.~.~> The compound contains plural peptide linkages, i.e., compound formed from amino acids, natural or synthetic, by reaction of a carboxyl group of one such amino acid with an amino group of another same or different such amino acid
171  DF  .~.~.~.~.~.~.~> The compound contains plural -C(=O)NHH where substitution may be made for the hydrogen (e.g., urea formaldehyde) {1}
173  DF  .~.~.~.~.~.~.~> The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)


DEFINITION

Classification: 516/169

The compound contains -C(=O)NHH group where substitution may be made for the hydrogen:

(under subclass 161) Subject matter in which the organic* compound which contains nitrogen contains -C(=O)NHH group where substitution may be made for the hydrogen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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