Viscotrol Trademarks

VISCOTROL
INSTRUMENTS FOR COMBINED MEASURING, INDICATING, AND CONTROLLING VISCOSITY IN BLENDING OR DILUTION OPERATIONS
Expired  ·  June 16, 1951  ·  71615268  · 
VISCOTROL-A
THICKENING AGENT FOR LIQUIDS
Expired  ·  November 7, 1975  ·  73068311  ·