6 BLEND OF CELLULOSIC POLYMERS AND CALCIUM CARBONATES FOR DEVELOPING VISCOSITY AND FLUID LOSS CHARACTERISTICS FOR USE IN OIL, GAS, WATER, DISPOSAL AND INJECTION WELLS
Trademark Events
May 10, 1993
Expired Sec. 9
Sep 19, 1977
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.