Screenshot from the Felix the Cat cartoon: The Goose That Laid the Golden Egg (1936). The cartoon was downloaded from archive.org. The copyright was not renewed.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
Screenshot from the Felix the Cat cartoon: The Goose That Laid the Golden Egg (1936), the cartoon was downloaded from [http://www.archive.org/details/felix_the_cat_the_goos_that_laid_the_golden_egg archive.org]. The copyright was not renewed.