What year was the Apollo space suit invented?

The Apollo space suit has its roots in the 1955 XMC2-ILC suit developed for the X-15 program by International Latex Corporation of Dover, DE (aka ILC). ILC would go on to further develop that suit to the point where it won the Apollo suit contract over 7 other competitors in 1962. It was used successfully through 1974 and no Apollo missions were ever cut short due to a problem with the suits. Patent no. 3,751,727 was filed by ILC to cover the development of the Apollo suit.