US PATENT SUBCLASS 516 / FOR 121
.~.~ Silica (252/315.6)

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 115  DF  .~ Gels, coagulates, or dispersands (252/315.01) {4}
FOR 121.~.~ Silica (252/315.6)

DEFINITION

Classification: 516/FOR.121

Silica:

Foreign art collections including subject matter wherein the composition contains silica.