72349434
Jan 23, 1970
Feb 23, 1971
Active Trademark
GAS SORPTIVE DEVICES EMPLOYING A NON-EVAPORATING GETTER METAL-NAMELY, ZIRCONIUM, TITANIUM, TANTALUM, OR NIOBIUM, ALLOYS OF TWO OF MORE OF THESE METALS WITH EACH OTHER OR WITH OTHER METALS
Housewares and Glass