The original Popeye and Tintin characters have now entered the public domain. The character of Popeye the sailor first appeared in the King Features comic strip Thimble Theatre on January 17, 1929. By the 1930s, the character had become extremely popular, and was later the face of King Features. He had multiple renditions over the years including a live-action movie starring Robin Williams. Tintin first appeared in The Adventures of Tintin in 1929 as part of weekly youth supplement to the Belgian newspaper Le Vingtième Siècle.

https://screenrant.com/popeye-tintin-characters-public-domain/