For Public Domain Day 2025 (previously), we learn that the original iteration of the character Popeye have entered into fair-use territory, joining Winnie the Pooh, Tintin, Mickey Mouse, Dracula, Sherlock Holmes and many others. Whilst the Sailor-Man 1.0 might have not yet derived his superpowers from eating spinach until 1931—it seems that the copyright for that canonical comic strip was not renewed, so it’s fair-use to incorporate that attribute retroactively and the Duke Center for the Study of the Public Domain was an explainer on how to navigate trademark law for liberated versions of personalities who still appearing in recent works still under protection, rights only extending to newly added traits and material and not the underlying figure. Incidentally had Popeye been in the creative commons earlier, like his girlfriend (and a whole person in her own right) Olive Oly based on ZaSu Pitts who predates him by several years and whose original love-interest was a lounge-lizard type called Harold Hamgravy, the Super Mario Brothers might have never been.