when was this act enacted?
July 23, 1965
Coinage Act of 1965
 Although there was some opposition, mainly from legislators representing Western mining states, the bill progressed rapidly through Congress, and was enacted with Johnson's signature on July 23, 1965.
when was silver taken out of us coins 1965
wiki:21561697
Coinage Act of 1965 [SEP] Introduction
Although there was some opposition, mainly from legislators representing Western mining states, the bill progressed rapidly through Congress, and was enacted with Johnson's signature on July 23, 1965. The new coins began to enter circulation in late 1965, and alleviated the shortages. They passed side by side with their silver counterparts for a time, but the precious metal coins were hoarded beginning in 1967 as the Treasury ended its efforts to keep silver prices low. The act also banned the production of silver dollars until at least 1970.