Today in 1910, US Patent 978476 A was issued, an invention of Arvid Nilson, assigned to the Wahl-Henius Institute Of Fermentology, for his “Hop-Extraction Process.” There’s no Abstract, although in the description it includes this summary:

The object of my invention is to provide a process of extracting these constituents from the hops which shall produce the extract in a peculiarly desirable condition for the uses referred to; and this I accomplish by the novel procedure hereinafter described and claimed.