A quick search on familysearch.org pulls up numerous records for Sanfrid:
1900 & 1920 census in Dekalb IL;
1940 census: inmate in Joliet IL;
Death of his wife Mathilda 5/30/1922 in Dekalb;
1903 naturalization record
The spellings of his names vary, but all of the records indicate or suggest a birthdate of Jan. 1861, not 1867. Perhaps you misread the year?
There are a number of Oscar Bergstens, but none really fit with your info.