Today in 1919, US Patent 1302549 A was issued, an invention of Herman Hausen, for his “Process For Brewing Beer.” There’s no Abstract, but as Prohibition began, the invention was specifically for non-alcoholic beer to satisfy demand for at least the taste of beer once the regular kind was outlawed. Here’s a fuller explanation.
My invention relates to the manufacture of non-alcoholic beer, of beer containing less than one-half of one percent of alcohol, and of temperance beer. In the processes heretofore employed for making such beverages, the de-alcoholizing occurs by distillation of the alcohol after the liquid vis fermented or the beer brewed. These old processes involve certain disadvantages which are obviated by my invention, which, generally speaking, consists in simultaneously boiling and fermenting the beer wort in a vacuum and within the range of beer fermentation temperatures at which the activity of the yeast is not destroyed to evaporate the alcohol and preserve live yeast in In the accompanying drawing I show more or less diagrammatically and mostly in sectional view all the apparatus required to carry out my new process.