She appeared in the 1860 census as Alvina Klute, with daughters Elizabeth 15 and Antonia 8. On familysearch, the spelling is Klate.
I couldn't find her in the 1870 census.
In newspaper The Buffalo Daily Republic, a series of notices in 1852 name her as Elvene Kluth, in regard to her petitioning to be administratrix of Bruno Kluth's estate.
In newspaper The Buffalo Daily Republic, a series of notices in 1853 name her as Elvina Kluth, administratrix of his estate.
No 1852 death notice or obituary in this newspaper for Bruno, surprising since the size of his estate seemed considerable.
Some mentions in newspaper here:http://fultonhistory.com/Fulton.html