US PATENT SUBCLASS 516 / 15
.~.~ The agent contains organic compound containing nitrogen, except if present solely as NH4+

Current as of: June, 1999
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516 /   HD   COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF

9  DF  CONTINUOUS LIQUID OR SUPERCRITICAL PHASE: COLLOID SYSTEMS; COMPOSITIONS CONTAINING AN AGENT FOR MAKING OR STABILIZING COLLOID SYSTEMS; PROCESSES OF MAKING OR STABILIZING COLLOID SYSTEMS; PROCESSES OF PREPARING THE COMPOSITIONS (E.G., THICKENING AGENT; PROTECTIVE COLLOID AGENT; COMPOSITION CONTAINING AN EMULSIFYING AGENT WITH NO DISPERSANT* DISCLOSED; ORGANIC LIQUID EMULSIFIED IN ANHYDROUS HF) {5}
10  DF  .~ Having discontinuous gas or vapor phase, i.e., foam {6}
15.~.~ The agent contains organic compound containing nitrogen, except if present solely as NH4+ {2}
16  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
17  DF  .~.~.~> The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)

DEFINITION

Classification: 516/15

The agent contains organic compound containing nitrogen, except if present solely as NH 4+:

(under subclass 10) Subject matter in which the colloid

system making or stabilizing agent* contains an organic* compound which contains nitrogen, except for when the nitrogen is present solely as the cationic ammonium group, NH 4+.

(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.

(2) Note. When classifying foam colloid systems, the agent should not be confused with the gas phase. The (colloid system making or stabilizing) agent is the component which tends to aggregate at the boundary between the gas phase and the liquid phase to facilitate or assist in the persistence of the system for the degree of time sufficient for its intended use.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20, for a similar colloid system making or stabilizing agent* used in organic* liquid continuous phase with organic* liquid discontinuous phase (e.g., oil-in-oil emulsion).

27, for a similar colloid system making or stabilizing agent* used in organic* liquid continuous phase with inorganic* liquid discontinuous phase (e.g., water-in-oil emulsion).

31+, for a similar colloid system making or stabilizing agent used in organic* liquid continuous phase with discontinuous phase primarily solid or semisolid. 43+, for a similar colloid system making or stabilizing agent* used in bituminous-in-aqueous emulsion.

67+, for a similar colloid system making or stabilizing agent* used in aqueous continuous phase with discontinuous phase primarily organic* liquid.

77+, for a similar colloid system making or stabilizing agent* used in aqueous continuous phase with discontinuous phase primarily (nonbituminous) solid.