1 SYNTHETIC FIBROUS MATERIALS USED IN A CEMENT COMPOSITION FOR THE CONSTRUCTION, COMPLETION, TREATING AND SERVICING OF WELLS, SUCH AS OIL, GAS, BRINE AND WATER WELLS, AND FOR CONSTRUCTION IN GENERAL
TOUGH CEMENT
Trademark Events
Nov 4, 1992
Expired Sec. 9
Feb 28, 1977
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.