US PATENT SUBCLASS 516 / 177
.~.~.~.~.~.~.~ The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



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}
176  DF  .~.~.~.~.~.~ The compound contains carboxylic acid ester group {1}
177.~.~.~.~.~.~.~ The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene) {1}
178  DF  .~.~.~.~.~.~.~>.~ The ester group is derived from mono-basic acid reactant


DEFINITION

Classification: 516/177

The compound contains repeating -(OC nH 2n)- (i.e., repeating unsubstituted oxyalkylene):

(under subclass 176) Subject matter in which the organic* compound which contains nitrogen and carboxylic acid ester group also contains repeating -(OC nH 2n)- (i.e., repeating unsubstituted oxyalkylene).

(1) Note. "Repeating -(OC nH 2n)-" means 2 or more, bonded directly to each other. Thus, this subclass requires at least two ether linkages; monoether derivatives are located elsewhere.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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