13 METALLIC TUBING FOR USE IN EVAPORATIVE HEAT TRANSFER APPLICATIONS, SUCH AS AIR CONDITIONING AND REFRIGERATION, AND PETROLEUM AND CHEMICAL PROCESSING
Trademark Events
Dec 7, 1992
Expired Sec. 9
Jun 6, 1977
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.