Photofest provided this information. "The Dumont Network closed down in 1956. TV publicity photographs were not copyrighted, so there is no reason to believe that there is any limitation imposed on our image. It is in the public domain"
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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Rentals grant one-time, EDITORIAL use only, unless otherwise negotiated. Please inform us about usage or non-usage as soon as possible. Research fees may apply if no images are used.