A renewal search was done in both film and copyright categories for the years 1957 and 1958. There were no results in either category for the title or for Inspiration Pictures. There's no evidence of continued copyright on the film or its 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.