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.
The image was published as an advertisement in the U.S. in 1925. There is no evidence that copyright notice was originally filed on the image, as then required. For instance, this image evidently shows the entire advertisement and no copyright notice.
A search of copyright renewal records for 1952 and 1953 ([1], [2], [3], [4]) reveals no evidence that the Strand Theater or British Talking Pictures (corporate heir to DeForest Phonofilms) or any asignee renewed copyrights to this advertisement or any collection of advertisements or any collection of material that might encompass this advertisement as would have been required to maintain copyright protection, if any.
There is no evidence that the Strand Theater or British Talking Pictures or any asignee claims copyright on the image.
File history
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{{Information |Description={{en|1=Newspaper advertisement for screening of several short films produced by DeForest Phonofilms at the Strand Theater of Biloxi, Mississippi.}} |Source=''Daily Herald'' (Biloxi) via [http://www.loc.gov/exhibits/bobhope/bh-ob