11 HIGH FLUX SEMI-PERMEABLE MEMBRANES AND MODULES CONTAINING SUCH MEMBRANES FOR USE IN PURIFICATION OF WATER, WASTE TREATMENT, GASEOUS SEPARATIONS, CHEMICAL AND FOOD TREATMENT AND PRODUCTION, AND THE LIKE
Trademark Events
Dec 11, 1995
Expired Sec. 9
Sep 30, 1980
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.