US PATENT SUBCLASS 516 / 68
.~.~.~ The nitrogen is a ring member (e.g., polyisocyanurate)

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}
53  DF  .~ Aqueous continuous liquid phase and discontinuous phase primarily organic liquid (e.g., organosilicon* oil- or mineral-oil*-in-water, o/w emulsion) {6}
67  DF  .~.~ The agent contains organic compound containing nitrogen, except if present solely as NH4+ {3}
68.~.~.~ The nitrogen is a ring member (e.g., polyisocyanurate)

DEFINITION

Classification: 516/68

The nitrogen is a ring member (e.g., polyisocyanurate):

(under subclass 67) Subject matter in which the organic* compound which contains nitrogen contains the nitrogen in a ring structure, such as polyisocyanurate.

(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:

15+, for a similar colloid system making or stabilizing agent* used in foam colloid system.

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.

60, for a similar colloid system making or stabilizing agent* which includes sulfoxy*.

77+, for a similar colloid system making or stabilizing agent* used in aqueous continuous phase with discontinuous

phase primarily (nonbituminous) solid.

SEE OR SEARCH CLASS

435, Chemistry: Molecular Biology and Microbiology,

262+, for processes 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 purify by treating gas, emulsion, or foam, subclasses 281+ for processes of recovering petroleum or shale oil), foreign art collection FOR 184 for method of using gentically engineered cells other than hybrid or fused cells for oil spill cleanup.