Ahmad Bardan has posted Redefining Personhood: The Legal Status of Artificial Intelligence on SSRN. Here is the abstract:
The connotation of personhood has been scrutinized throughout history by philosophers and jurisconsults who tried to elaborate what being a person means. Simply put, the notion of personhood tolerates a bifurcated approach.
For a different take, see Legal Personhood for Artificial Intelligences.