English: Original movie poster for the Republic Pictures serial Undersea Kingdom (1936).
Renewal searches were done in both film and artwork for the years 1963 and 1964. There were no listings for the title in film nor any for "Crescent" in artwork. There's no evidence of the film and its related items still under copyright.
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.