US PATENT SUBCLASS 516 / DIG 4
.~.~ Protein or carboxylic compound containing (252/354)

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516 /   HD   COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF

DIG 1  DD  WETTING, EMULSIFYING, DISPERSING, OR STABILIZING AGENTS (252/351) {4}
DIG 3  DD  .~ Organic sulfoxy compound containing (252/353) {2}
DIG 4.~.~ Protein or carboxylic compound containing (252/354)