Renewal searches were done in film and artwork for the years 1950 and 1951. There were no listings for the film title in films and no listings for Logan, Playgoers' or Morgan (printed the poster) in artwork. There's no evidence of renewal for the film and its associated materials.
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.