US PATENT SUBCLASS 516 / FOR 135
.~.~.~.~.~ Inorganic agents (except water) (252/330)

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

FOR 100  DF  COLLOIDS AND POTENTIAL COLLOIDS; CHEMICAL PROCESSES OF MAKING AND BREAKING (252/302) {8}
FOR 124  DF  .~ Resolving colloids or inhibiting colloidization (252/319) {1}
FOR 125  DF  .~.~ Liquid primary dispersants (252/320) {5}
FOR 131  DF  .~.~.~ Added nongaseous dissimilar treating substances (252/326) {2}
FOR 133  DF  .~.~.~.~ Resolving aqueous-petroleum or aqueous-hydrocarbon systems (252/328) {3}
FOR 135.~.~.~.~.~ Inorganic agents (except water) (252/330)

DEFINITION

Classification: 516/FOR.135

Foreign art collections including processes in which the added treating substance includes a free chemical element or inorganic compound other than water.