Before the 1970s, U.S. copyright terms lasted for only 56 years, but over time Congress has extended that to 95 years — the last extension being in 1998. Those extensions have been pushed primarily by Hollywood, with the joke being that Disney will do whatever it takes to keep “Steamboat Willie” — the first film featuring its signature Mickey Mouse character — from falling into the public domain. According to an article in Ars Technica, it appears that Hollywood is now giving up on further extensions due to greater public awareness of copyright issues. So on 1 January 2019, every work of art published in 1923 will fall into the public domain, something that has been delayed for over 40 years. And unless something changes, “Steamboat Willie” will move into the public domain in 2024, though Disney would still own the trademark to Mickey Mouse.