Naturalization Again

Now I am on a naturalization kick. I decided to move on to the Francis side of the family and look into Ernesto Francisco's naturalization status. I know I will not be able to find his records in footnote, as he would have filed in Rhode Island, or perhaps VT, but at least this will be a first step in the research process. So I start with his WWI draft registration card, which states in 1917 he is an alien, but next to his status is a date of 1909. I am assuming this date refers to the date that he started the naturalization process, so I am guessing in 1909 he declared his intentions. I then looked into the census records I have found for Ernesto. In both the 1920 and 1930 census it states pa under naturalization, which supports the draft registration information of perhaps starting the process in 1909. Apparently though by 1930, he has not been fully naturalized, so he may not have even filed his petition for naturalization at this point.