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.
Portrait photograph of Allen Tracy Hazen (1904-1977) by Moffett Studio from University of Chicago Photographic Archive, apf1-02723, Hanna Holborn Gray Special Collections Research Center, University of Chicago Library.
Uploaded a work by Moffett Studio from University of Chicago Photographic Archive, apf1-02723, Hanna Holborn Gray Special Collections Research Center, University of Chicago Library. https://photoarchive.lib.uchicago.edu/db.xqy?one=apf1-02723.xml with UploadWizard