U. S. SILICA COMPANY Trademarks
SIL-CO-SIL
Filed: August 18, 1954
GROUND SILICA SAND
Owned by: U. S. SILICA COMPANY
Serial Number: 71671905
U.S. SILICA
Filed: September 12, 1988
SILICA AND PROCESSED CLAYS
Owned by: U. S. SILICA COMPANY
Serial Number: 73751693
