Good Morning Mr. Cipolla
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I searched familysearch.org for information. I did not find a naturalization for Santo Cipolla. Family Search is a free website.
There are other websites that could be checkd such as Ancestry.com it is a pay site. They do give a free trial. But do not give up other researchers may find his naturalization. Please check the links that I have found below to see if that is your family.
Immigration with brother Francesco to Kansas City Missouri........... https://www.familysearch.org/ark:/61903/3:1:3QS7-89ND-L2GV?i=219&cc=1368704&personaUrl=%2Fark%3A%2F61903%2F1%3A1%3AJX4Z-…
If the 3 Census records above are your family, Sam and Mary are listed as AL (alien) means they had not been naturalized up until 1940.
Dear Mr. Cipolla,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Population Schedules for the 1900 Census, the Population Schedules for the 1910 Census, the Population Schedules for the 1920 Census, the Population Schedules for the 1930 Census, and the Population Schedules for the 1940 Census in the Records of the Bureau of the Census (Record Group 29) that may contain the citizenship status for your grandfather. The 1940 Census schedules are digitized and available using the Catalog. See NARA’s 1940 Census Records web page for more information. For access to the non-digitized schedules, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at firstname.lastname@example.org.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
For information about the U.S. Census, see the Census Bureau technical documentation and questionnaires. In addition, please review the FamilySearch wiki for Naturalization Terms and Acronyms.
You may wish to search Ancestry.com for the U.S. Census. There may be a fee for using Ancestry. Instead, some of the images from Ancestry are available for free on Family Search or at your local library. Many library systems subscribe to these sites, making them free for their patrons.
We also suggest that you review the NARA’s Immigration Records website as well as the FamilySearch Research wiki for United States Emigration and Immigration Genealogy.
We hope this is helpful. Best of luck with your family research!