7 Steel Cylinders Used as Liners for Oil Well Mud Pumps and Cement Pumps, Centrifugal Pumps for Pumping Oil Well Fluids, and Reciprocating Valves and Pistons for Mud Pumps
8 Valve Lifting Tools for Removing Valves from the Fluid End of Reciprocating Pumps
17 Replacement Rubber Sealing Elements for Stem Valves and Replacement Rubber Piston Elements for Reciprocating Pistons
Trademark Events
Jul 20, 2002
Cancelled Sec. 8 (10-Yr)/Expired Section 9
Apr 12, 1988
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.