11 ULTRAFILTRATION MEMBRANES, ELEMENTS UTILIZING SUCH MEMBRANES, AND SYSTEMS EMPLOYING SUCH ELEMENTS FOR PURIFICATION OF WATER, WASTE TREATMENT, CHEMICAL AND FOOD TREATMENT AND PRODUCTION, AND THE LIKE
Trademark Events
Apr 8, 1996
Expired Sec. 9
Jan 6, 1981
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.